Cracking a Pdf Password

PDFCrack is a GNU/Linux (other POSIX-compatible systems should work too) tool for recovering passwords and content from PDF-files. It is small, command line driven without external dependencies. The application is Open Source (GPL).

pdfcrack Features:
  • Supports the standard security handler (revision 2 and 3) on all known PDF-versions
  • Supports cracking both owner and userpasswords
  • Both wordlists and bruteforcing the password is supported
  • Simple permutations (currently only trying first character as Upper Case)
  • Save/Load a running job
  • Simple benchmarking
  • Optimised search for owner-password when user-password is known
Install pdfcrack in Ubuntu
sudo aptitude install pdfcrack

pdfcrack Syntax
pdfcrack -f filename [options]
pdfcrack Options
-b, - -bench - Perform benchmark and exit.
-c, - -charset=STRING - Use the characters in STRING as charset.
-m, - -maxpw=INTEGER - Stop when reaching INTEGER as password length.
-n, - -minpw=INTEGER - Skip trying passwords shorter than INTEGER.
-l, - -loadState=FILE - Continue from the state saved in FILENAME.
-o, - -owner - Work with the ownerpassword.
-p, --password=STRING - Uses STRING as userpassword to speed up breaking ownerpassword (implies -o).
-q, - -quiet - Run quietly.
-s, - -permutate - Try permutating the passwords (currently only supports switching first character to uppercase).
-u, - -user - Work with the userpassword (default).
-v, - -version - Print version and exit.
-w, - -wordlist=FILE - Use FILE as source of passwords to try.

pdfcrack Examples
pdfcrack test.pdf

source:title link

Comments

ale said…
varias veces necesité de esto, incluso he sabido la clave pero no he encontrado dónde ponerla (lease en contexto) pero siempre desde el adobe y desde güindous
Anonymous said…
What is the file format required for a wordlist file

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