Analyzing obscure tech support threads (e.g., Reddit r/techsupport, BleepingComputer) reveals a handful of users asking about similar phantom files:
Older or niche backup utilities occasionally use modified extensions to prevent automatic extraction by standard operating system tools. 3. Possible Associations
If extraction fails with errors like "unexpected end of data" or "corrupted archive", the l in .zipl may indicate a truncated or incomplete file.
If this is a specific homework assignment or a document from an organization, providing the name of the institution
: The name suggests it may be a private archive related to a specific person or student records.