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password cracking

PDF

file document.pdf 
document.pdf: PDF document, version 1.6, 1 page(s)

Use pdf2john to extract password hash: 

/home/user/pdf2john/.venv/bin/pdf2john document.pdf
$pdf$4*4*128*-12*1*16*...
 
/home/user/pdf2john/.venv/bin/pdf2john document.pdf > hash.txt
hashcat --help
 
  10400 | PDF 1.1 - 1.3 (Acrobat 2 - 4)                              | Document
  10410 | PDF 1.1 - 1.3 (Acrobat 2 - 4), collider #1                 | Document
  10420 | PDF 1.1 - 1.3 (Acrobat 2 - 4), collider #2                 | Document
  10500 | PDF 1.4 - 1.6 (Acrobat 5 - 8)                              | Document
  25400 | PDF 1.4 - 1.6 (Acrobat 5 - 8) - user and owner pass        | Document
  10600 | PDF 1.7 Level 3 (Acrobat 9)                                | Document
  10700 | PDF 1.7 Level 8 (Acrobat 10 - 11)                          | Document