My Avast also found this same identical thing, about a hundred files in there. I just thought it was my regular JAVA, but now I don't think so.
Could it be that when you visit the MD5 site that it DL's this onto your computer silently? I have been to the site a few times to see what the "magic button" uproar was all about, but have never actually DL'd the MD5 program.
If this has something to do with MD5, it definitely doesn't sound like good news for them---just my opinion. I was planning on starting it up on a couple tonight, but may not now.
I noticed a similiar post was made at USD also pertaining to this.