You can be 100% sure that the file you have downloaded from Getmart.net is clean and safe. You should understand that viruses and malicious code are completely different things. Virustotal is a tool for checking files for viruses, and you cannot use it to detect malicious code in PHP/JS, such as backlinks, web shells, or backdoors.Today’s malicious code can be no different from ordinary code and it is often impossible to detect it with automated tools. However, we recommend using specialized tools such as VirusDie or Imunify to locate malicious code in files if you encounter such a need.
In the list of antiviruses VirusTotal there are Chinese antivirus solutions, such as Bkav, Jiangmin, Rising, Cyren. Such antiviruses often check the code simply for the presence of function eval, base64_encode/decode, etc. Although the presence of such constructions in the php-code does not at all mean that the code is malicious, and many developers use these functions for their own purposes (packing/unpacking data, custom fonts in css and others). For this reason, Chinese antiviruses often detect on absolutely clean files downloaded directly from developers. This is called false positives.