The .part3.rar extension indicates this is the third piece of a larger file. You usually need all parts (Part 1, Part 2, etc.) in the same folder to successfully extract the contents using software like WinRAR or 7-Zip .
Files with this naming convention typically carry the following characteristics: packs-superpackpormega.com.part3.rar
Downloads from third-party file-sharing sites (like Mega-link aggregators) carry a higher risk of containing malware or unwanted software. It is strongly recommended to scan the file with a reputable tool like VirusTotal before opening or executing any files inside. packs-superpackpormega.com.part3.rar