Do not extract the contents. Compressed archives like .rar or .zip are often used to hide viruses or malware from basic scanners.
RAR (Roshal Archive) is a compressed file format.
“You can try uploading the RAR file to virustotal.com and check the results.” Purism community · 5 years ago
Because "56579.rar" does not correspond to a recognized program, treat it with extreme caution:
If you have already downloaded the file, do not open it. Instead, upload it to the VirusTotal scanner to see if it triggers any security flags from major antivirus engines.
Malicious files sometimes use names like 56579.rar.exe to trick users into running an executable while thinking they are just opening a folder.
Legitimately used for data compression and splitting large files into smaller parts.