Comment by Dwedit

For anyone out there still using MD5 for any reason, check out this PDF file: https://www.alchemistowl.org/pocorgtfo/pocorgtfo14.pdf (42MB). You can also rename it to a .NES file and run it in a NES emulator.

It's a PDF File which is also a NES ROM that displays its own MD5 sum. The PDF also shows its own MD5 sum a few times. (The MD5 sum also happens to begin with 5EAF00D)

When an arbitrary MD5 can be created that easily, it's useless for any cryptographic applications, or even any data integrity.