[NexusH]

Hello everyone, I am particularly interested in keyloggers, I would like to know if it is possible to hide an executable file in a pdf document, for example?
Sorry for my low level English, I'm Spanish;)

[Florin Salam]

Hiding is not the actual problem but executing the code and that's something that cannot be achieved by design. However, you could actually inject client side code into a PDF and have it executed, look at external entity injection.

The idea is that PDF's structure is XML based and the XML language has a feature that allows you inject external data in order to make use of it depending on the logic of such XML document. Therefore, you could actually inject a JS library or inline javascript code.

[rimane]

You can also take a look to macro exploits, they are really usefull to use with keyloggers or rats.