"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.
the file if you received it from an untrusted source, unsolicited email, or a "cracked software" site. PIFNLB.7z
Based on current security trends and file naming conventions: "PIFNLB
Where did you this file from, or what is it supposed to contain? PIFNLB.7z