Hi Phil,
I have Kaspersky Internet Security installed on my system and checked it out again couple of minutes ago. It's definitely no problem with Kaspersky.
Talking about
https://virusdesk.kaspersky.com
Just tried to download the file for scanning and got:
An error occurred during scan. Please try again later.
I think the scan system is out of order at the moment.
About Windows Defender.
You can submit the file here:
https://www.microsoft.com/en-us/wdsi/filesubmission
to check it out. I'll do it too.
Bkav, CAT-QuickHeal, CrowdStrike Falcon ... are small antivirus companies which usually don't reply on submission.
But Symantec, Bitdefender, Kaspersky, ESET-NOD32 don't detect any problem.
I am sure and can guarantee that all files you got from the site are clear from any malicious code and any detection is false positive.