99% of the time, "CIDFont F1Normal" is just Arial or Helvetica being referenced by old software.
regarding why these names appear in PDFs and how to map them to real fonts. Learn how to install fonts on Windows once you have downloaded your chosen replacement. cidfont f1normal font free download best
If you are seeing this name, it usually means your system is missing the actual font used in a document, and you need to identify or replace it with a standard typeface. Common Replacements for CIDFont+F1 99% of the time, "CIDFont F1Normal" is just