It may refer to an archive of "Archive and Support Files" for specific older software, such as Kodi. Critical Security Advice
In some gaming communities, specifically Far Cry 3 , a file named NoEnemy-ASF.rar has been shared on forums like Gaming StackExchange to disable enemy tagging on the minimap. ASF.rar
Upload the file or its download URL to VirusTotal to check it against dozens of antivirus engines. It may refer to an archive of "Archive