Excercise Link : www.binary-auditing.com
Solution Link : http://resources.infosecinstitute.com/hex-editor/
The provided file is a split PE that has to be recombined after generating headers for it as well. Further the only tool used is a generic hex editor with additional features like byte histogram/entropy/opcode visualization etc may be used as extra features as and when needed. The goal is to keep it simple and quick.
I think the exercise is quite simple enough for beginners to intermediate in malware analysis as pe rebuilding is quite a common activity post unpacking in many packed malwares.
I hope you find it useful