If you do decide to open it, ensure you are using an updated version of extraction tools like WinRAR or 7-Zip to protect your system from known archive-processing vulnerabilities.
If the number "52005" is tied to a specific system or process from which you downloaded this file, it might refer to one of the following:
Leave the file compressed until you verify its source.
Run the file through a reputable local antivirus or upload it to a multi-engine scanner like VirusTotal to check for malicious payloads.
For instance, Panasonic manufactures a relay part labeled ADJ52005 . The file could be containing CAD drawings or datasheets for this hardware. ⚠️ Security Best Practices for RAR Files