Steganography goes way beyond .zip files.
http://www.infosyssec.com/infosyssec/Steganography/techniques.htm
“Steganography goes way beyond .zip files.”
Sure, but the false claim that is being made about this specific file is that there is a zip file hidden there. There is no zip file. Short of finding the first two letters of a PKZIP header, there is no evidence or claims of anything else hidden there.