This format supports AES-256 encryption. if you try to open it and it asks for a password, the data is encrypted. Safety Recommendations
To view the contents, you must use a utility like WinRAR , 7-Zip , or The Unarchiver (macOS). 52869.rar
Do not run any .exe , .scr , or .bat files found inside. This format supports AES-256 encryption
Could you share or what the email/website claimed it was? This will help me give you a much more specific breakdown. 52869.rar
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RAR (Roshal Archive) is a proprietary format that generally offers higher compression ratios than standard ZIP files.