This is so strange. Unfortunately I can't find any security issue on the server or any files that caused this.

Here is a screenshot of webmaster tools(1). The pages it lists are html pages and I've checked the source code and there are no script or anything on them.

Also the virustotal site says 'base64-embedded'. Those are just svg images I've embedded in the html to reduce the number of requests. That can't be a trigger right?

(1) https://i.imgur.com/iHYWyG4.png

The virus engines are probably listing it because they check the Google malware listings.