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PDF Password Cracker Pro user manual
PDF Password Cracker Professional edition allows to search for "owner" and "user" passwords with brute-force and dictionary attacks, effectively optimized for speed (however, don't expect to recover long passwords in a reasonable time with these attacks). In addition, it has Key search attack, which guarantees the decryption (regardless the password length and complexity) of PDF files that use 40-bit encryption (the attack takes about 3-4 days on fast CPU systems).

The standard security provided by PDF consists of two different methods and two different passwords. Owner Password allows to prevent PDF file from printing, editing (changing), selecting text and graphics (and copying them into the Clipboard), or adding/changing annotations and form fields; User Password locks the file so the password is required to open or view the file. If only owner password is set, decryption is being done instantly; decrypted file can be opened in any PDF viewer (e.g. Adobe Acrobat Reader) without any restrictions, i.e. with edit/copy/print/annotate functions enabled. Alternatively, owner password can be recovered using brute-force or dictionary attacks.

Additionally, PDF Password Cracker Pro supports "key search" attack that allows to decrypt (in a reasonable time) PDF files with 40-bit security regardless the password length, guaranteed.
PDF Password Cracker Pro
项目符号 Easy to use
项目符号 Drag and drop PDF files
项目符号 Do NOT need Adobe Acrobat software
项目符号 Support Windows 98, ME, NT, 2000, XP, 2003, Vista Systems
项目符号 Support PDF 1.7 (Acrobat 8.x) files, including 40-bit RC4 decryption, 128-bit RC4 decryption, AES decryption, compressed files and unencrypted metadata
项目符号 Support Adobe Standard 40-bit decryption, Adobe Advanced 128-bit decryption and AES decryption
项目符号 Recovers user password required to open the file
项目符号 Brute-Force, or Dictionary attacks are used to recover the password
项目符号 Additional user dictionaries support, case changes, multiple mistypes and other modifications for each dictionary word
项目符号 Program automatically saves password search state and can resume after a stop or a crash
项目符号 Patterns can be used to minimize search time if any part of the password is known
项目符号 Non-English characters in passwords are supported
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USE PDF Password Cracker software
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PDF Password Cracker Pro

The demo version of PDF Password Cracker Pro is a fully functional product with all features required for testing available. After you are convinced that the program fits your needs, you are strongly encouraged to purchase and register your copy of the software by acquiring a personal unlock key, the demo version is can only decrypt the first half pages of your original PDF file.

In your evaluate period, you may click “Try” button to try this software .

Main interface of the software:

PDF Password Cracker Pro

Load: Open PDF file for retrieve password.
Decrypt: Decrypt current PDF file.

Type of attack:
    Brute-force: Brute force attack for PDF file.
    Dictionary: Construct user password from a dictionary file.
    Key search: Search file key for a 40-bit encryption PDF file, the key length is 40 bits, so the total number of keys is 2^40, or 1,099,511,627,776, the whole recovery process takes about 30 days on PIII-450 computer, and the average is just 15 days.

All small latin (a-z): abcdefghjiklmnopqrstuvwxyz
All digits (0-9): 0123456789
All special symbols (!@...): `~!@#$%^&*()-_=+\|,./<>?;:'"[]{}
Space: Space character
All printable: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghjiklmnopqrstuvwxyz0123456789 `~!@#$%^&*()-_=+\|,./<>?;:'"[]{}
User defined characters: User defined characters for construct passwords

Minimal password length: Minimal length for passwords.
Maximal password length: Maximal length for passwords.
Start from: First password to be tried.
End at: Last password to be tried.

Dictionary file path: Load a dictionary file for dictionary attack.
Try all possible upper/lower case combinations: Construct passwords from dictionary file automatically.

How to use the PDF Password Cracker Pro product?

项目符号 Open the PDF Password Cracker Pro program by either going to Programs, select PDF Password Cracker Pro v3.0 and click PDF Password Cracker Pro v3.0. The interface below will display.
项目符号 Click the "Load" button to locate the file which you would like to remove the passwords, then click the "Open" button.
项目符号 Click the "Decrypt" button or "Start" button, then PDF Password Cracker Pro will test the passwords for your PDF file automatically.
项目符号 Once PDF Password Cracker Pro retrieved the user password, it will popup a "Save As" dialog, you may save to a normal PDF file directly, all restrictions will be removed from this decrypted PDF file.

==== Known limitations ====

  1. PDF files protected using PDF Merchant and EBX digital rights management schemes or 3rd party plugins such as FileOpen, SoftLock etc cannot be decrypted.
  2. Brute-force attack is effective for short passwords only, usually up to 7-8 chars. Recovering longer ones will take too much time (months, years) even on a very fast computer. If your file has "user" password and use 40-bit encryption, you can use Key search attack.

The program that is licensed to you is absolutely legal and you can use it provided that you are the legal owner of all files or data you are going to recover through the use of our software or have permission from the legitimate owner to perform these acts. Any illegal use of our software will be solely your responsibility. Accordingly, you affirm that you have the legal right to access all data, information and files that have been hidden.

You further attest that the recovered data, passwords and/or files will not be used for any illegal purpose. Be aware password recovery and the subsequencial data decryption of unauthorized or otherwise illegally obtained files may constitute theft or another wrongful action and may result in your civil and (or) criminal prosecution.