Yeah, any file that is capable of changing anything about another program will be flagged by a few antivirus tools. They all use different, proprietary detection criteria so it's hard to say for sure what an individual tool doesn't like about an individual file.
9 out of 6 is really nothing though. I think if you run some other trusted files through, you'll be surprised at the results (I'm talking executables or scripts, not like images obviously). I don't even get suspicious until the detection rate approaches 50%.
Steve also makes a good point that every tool that flagged it recognized it as a different piece of malware. There's much more concurrence on a true piece of malware.
It's also worth noting that the only positives were no-name virus scanners. The big names like Kaspersky, Norton, Malwarebytes etc are very over-cautious and will therfore often return false positives... But they won't often ALL miss something if it's real. In fact, I'd say that's almost impossible.
So, this file is definitely clean... Which I know we'd already established, I'm just offering tips on a useful tool for future reference.