I thought it was a little odd for Chrome... but I don't have anything in my extensions that should be looking at files. So I'm not sure what's doing it... That isn't really the relevant point, I guess... it's that the file is still being flagged. But your observation about wimbli is informative.

Chrome is giving me an alert when I download this file. I'm sure it's a false positive, and I can get Chrome to let me at the file anyway...

I've fed the url (https://dffd.bay12games.com/download.php?id=7622&f=Dwarf+Fortress+40_13+Starter+Pack+r3.zip) to VirusTotal, which shows no threats. Report here: https://www.virustotal.com/ca/url/c84c46213178709b2aa17c12faed1071b87eaf7c38a94e298623dfe0043ed64d/analysis/

So like I said, I'm sure it's fine and just a false positive... but I wanted to put this information up in case it helps someone.

I'm looking into whether or not there's a way to report False Positives to Chrome.