hello,
thanks for your question, I have review the problem. I get a sample from hxxp://phoenix.brouzeka.ru/installer/get.php and it has been signed by digital signature “AO Adamant-Soft” (issuer: “COMODO RSA Code Signing CA”). We register many malware samples signed with the same signature (e.g. https://www.virustotal.com/en/file/c77badd4f3c8902471888fb3e61b78bff3014a3276fd75fa1c89972b22338119/analysis/ , https://www.virustotal.com/en/file/6f8b3c6bf85bef3427480ec86168eb64fc42bbf0a6a142c193ac30713c0e750f/analysis/ …). That is the reason, why the sample is detected.

If the certificate was misused or stolen, you should stop using compromised certificate, revoke it and request your certification authority for a new certificate.