In this web site we can find malicious programs that the majority they are undetectable for 97% of the antivirus software. I hope that the virus lab of Alwil could realize an investigation on the content that exists in the same one.
In this situation Malwarebytes also it is blind for the majority of them.
At the moment, the site seems to be clean but it does use an old version of Wordpress which is vulnerable to attacks. See this report:
http://www.UnmaskParasites.com/security-report/?page=www.amprox.com
And, the Google Safe Browsing report :
http://www.google.com/safebrowsing/diagnostic?site=www.amprox.com