PDF Password Cracker Pro v2.0 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.

Registration Window:

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:

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 caps latin (A-Z): ABCDEFGHIJKLMNOPQRSTUVWXYZ
All small latin (a-z): abcdefghjiklmnopqrstuvwxyz
All digits (0-9): 0123456789
All special symbols (!@...): `~!@#$%^&*()-_=+\|,./<>?;:'"[]{}
Space: Space character
All printable: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghjiklmnopqrstuvwxyz1234567890 `~!@#$%^&*()-_=+\|,./<>?;:'"[]{}
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.

  1. Open the PDF Password Cracker Pro program by either going to Programs, select PDF Password Cracker Pro v2.0 and click PDF Password Cracker Pro v2.0. The interface below will display.
  2. Click the "Load" button to locate the file which you would like to remove the passwords, then click the "Open" button.
  3. Click the "Decrypt" button or "Start" button, then PDF Password Cracker Pro will test the passwords for your PDF file automatically,
  4. 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.

      If you have any technical questions, suggests, bug reports, please contact us at mailto:support@crackpdf.com

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