If you have the original file, re-export it with "Embed All Fonts" selected in the settings.
The term is a label generated by PDF creation software (such as Adobe Acrobat, InDesign, or CAD programs) when it exports a document using Character ID (CID) encoding. Cid Font F1 Normal
: Free online PDF printers or conversion tools frequently fail to map fonts properly during export. 3. How to Identify the Original Font If you have the original file, re-export it