Users searching for wk5 to pdf conversion are typically exploring options how to export very old Lotus 1-2-3 spreadsheets to PDF format, something that might be a little bit problematic, but certainly not impossible.
Your best option actually is to try to find old copy of Lotus 1-2-3 on some abandonware website and export the data to CSV or some other exchange format that you can import and print to PDF in modern software. Or you can try some of the software tools that, at least in the past, did still support old Lotus 1-2-3 formats.
Updated: September 11, 2023