If you only need to view or print the file (and don't need to edit the text), use the Transparency Flattener in Adobe Illustrator to convert the text into shapes (outlines). This removes the need for the font entirely.
You typically see these names when an app tries to read a PDF but can't find the source font data it needs to let you edit the text. How to Fix or Work Around Them cid font f1 f2 f3 f4
Note: These mappings are arbitrary and can vary completely from one document to another. ⚠️ Common Issues & Solutions If you only need to view or print
Convert or repair CID fonts: