Hi! Welcome to the forum! I am not an administrator but I can tell you that this issue is likely a false-positive that has been caused by a heuristic firewall of some kind. Your website works fine when I view it and I can see that it is all about architecture. There is nothing wrong about it, at least in my very first glance.
It’s difficult to pinpoint the file that contain the said malware without conducting a thorough malware scan. You should conduct a security scan on every file not only to confirm whether the report is false-positive or not, but also to identify the type of malware, the severity of the malware, and other details which are not included in the said report.
I noticed your website does not have any SSL certificate. You should install SSL certificate and redirect the traffic over HTTPS protocol. Not only it will make your website secure, but it can also increase the visitor’s trust level. Some browsers will show warning messages before you can proceed without the HTTPS protocol and even stop you from accessing any website that does not have any SSL certificate. That’s why it’s very important for you to have it.
Luckily, Infinityfree provides free SSL certificate installation in the client area.
After you’ve successfully installed the SSL certificate, do this:
This will strengthen the security of the website.