So I was about to install Battle.net Desktop App to play some World of Warcraft. Downloaded from the official Blizzard.com website. (https://www.blizzard.com/en-us/apps/battle.net/desktop)
Just out of curiousity I ran the .exe through Virustotal.com and expected it to be clean with a high community score (as it is a pretty popular software with millions of users).
However, when uploading the .exe it gets submitted as a unknown program, in other words as a .exe which has never been uploaded to Virustotal before. I shrugged and downloaded another copy of the same .exe with the same result.
Checking the sha256sum of each file shows that a new hash is generated for each download of the Battle.net app. Maybe some personal identifier gets injected in each download?
Also, none of the installers are signed according to Virustotal.com. "File not signed". However in Windows, when I right click on the installer -> Properties -> Digital Signature -> Information. It says: Digital signature OK".
This has never happened to me before. Could somebody help me verify this behaviour and possible give a reasonable explanation as to why this is happening with the Blizzard App?
Question 1. Why is a new hash being generated for each download of the .exe
Question 2: Why does Virustotal say it's not signed?