Use VirusTotal or your local antivirus software to scan the file before opening it.
If this is part of a specific online community (e.g., gaming, forums, specific media), check the original source for context.
If you can provide more details about where you found this file or what it is supposed to contain, I can offer more specific advice. To help me identify this file, could you tell me:
Do not open or extract the file unless you know the source.