Pifnlb.7z Link

: Ensure you are using the official 7-Zip software to open archives, as third-party versions from sites like 7zip.com (instead of .org ) have been found to be infected.

the file if you received it from an untrusted source, unsolicited email, or a "cracked software" site. PIFNLB.7z

"PIFNLB.7z" appears to be a specific archive file rather than a widely known software tool. There is no official or widely documented software by this name. : Ensure you are using the official 7-Zip