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No hace falta tener instalado Gnu/Linux, simplemente con tenerlo en una máquina virtual en VirtualBox, sirve.
Otras formas de abrir un archivo pdf sin tener la contraseña: http://www.dragonjar.org/ver-pdf-s-que-tienen-contrasena-con-gmail.xhtml
— Ver la información del paquete o programa desde ‘apt’ sin instalar. —
apt-cache search pdfcrack
pdfcrack – Recuperador de contraseñas de archivos PDF
— Instalar el paquete con ‘apt’ —
apt-get install pdfcrack
— Ver el manual de pdfcrack —
man pdfcrack
PDFCRACK(1) PDFCRACK(1)
NAME
pdfcrack – PDF files password cracker
SYNOPSIS
pdfcrack -f filename [options]
DESCRIPTION
pdfcrack is a simple tool for recovering passwords from pdf-documents.
It should be able to handle all pdfs that uses the standard security
handler but the pdf-parsing routines are a bit of a quick hack so you
might stumble across some pdfs where the parser needs to be fixed to
handle.
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.
AUTHOR
Written by Nacho Barrientos Arias for the Debian
GNU/Linux system (but may be used by others).
BUGS
Report bugs to Henning Noren .
COPYRIGHT
Copyright © 2006, Henning Noren –
All Rights Reserved. This program is free software; you can
redistribute it and/or modify it under the terms of the GNU General
Public License as published by the Free Software Foundation, Inc.
http://sourceforge.net/projects/pdfcrack
pdfcrack 0.8 october 26, 2006 PDFCRACK(1)
— Crackear la password de un archivo pdf cualquiera —
pdfcrack -f petar.pdf -c abcdefghijklmnñopqrstuvwxyz -s
PDF version 1.6
Security Handler: Standard
V: 2
R: 3
P: -1340
Length: 128
Encrypted Metadata: True
FileID: 3548a1b4366709b8cd529346feaa0adc
U: c6d995d9773dc64ef90fcbe21bea348e000000000000000031003801e87c3e00
O: 2a262c8d0684a8d9fa4985c911de181d08cd39049435081b950b10c05dda8743
Average Speed: 23651.7 w/s. Current Word: ‘Wudk’
Average Speed: 27023.5 w/s. Current Word: ‘ohxu’
Average Speed: 27364.2 w/s. Current Word: ‘Mgvha’
Average Speed: 25303.2 w/s. Current Word: ‘aytra’
Average Speed: 27458.5 w/s. Current Word: ‘Vdteb’
Average Speed: 26635.7 w/s. Current Word: ‘yhuzc’
Average Speed: 27650.8 w/s. Current Word: ‘Yawmd’
Average Speed: 27337.8 w/s. Current Word: ‘bqtxd’
Average Speed: 27694.2 w/s. Current Word: ‘ezvke’
…Más tarde, aquel mismo día…
Average Speed: 27739.7 w/s. Current Word: ‘yrlrn’
Average Speed: 27750.3 w/s. Current Word: ‘Rjchr’
Average Speed: 27748.7 w/s. Current Word: ‘zkfsr’
Average Speed: 27750.2 w/s. Current Word: ‘Vmifs’
Average Speed: 27627.7 w/s. Current Word: ‘Ixjqs’
found user-password: ‘mipassperdida’
La password encontrada es una password de usuario: mipassperdida.
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¿Te fijaste que al principio del artículo hay una cosa que pone DISCLAIMER?. Pues si se te queman las tostadas por intentar poner en practica lo que dice este articulo o se te raya un CD de El Fary por leerlo no es culpa nuestra. Avisado quedas.
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