: Use a service like VirusTotal to upload the file (or its hash) and check it against dozens of antivirus engines.
: Specialized CAD or CAM software occasionally generates compressed archives with alphanumeric project strings. TERST46542- MW.rar
Do you have more on where you found this file or what device/software it might be associated with? : Use a service like VirusTotal to upload
: If you must inspect the contents, open the archive inside a virtual machine or a "sandbox" environment to prevent any potential scripts from affecting your primary operating system. TERST46542- MW.rar