hashScan:

hashScan is a simple tool for checking whether a file is malicious or not. It is meant to speed up the process of finding malicious files by providing a simple interface to services such as threatExperts.

Usage:

test@Test-PC $ ./hashScan file1.exe
  Scanning [file1.exe]
  md5: <randomhash>
  entropy: <randomShannonentropy>
  Malicious: <probably>

As a side note , I'm making a point of checking all my code with -Wall && -Werror enabled. I'm also running every program through valgrind to check for memory errors. I'd really recommend this to anyone starting out with C.