Since you cannot download these "fonts," you must instead repair the document or identify the original font. Impossible fonts to be found / Fontes impossíveis de achar
Many malicious sites disguise .exe or .zip malware files as font downloads. cid font f1 f2 f3 f4 free link download
Select (or Save as PDF on Mac) as your printer destination. Click the Advanced button in the print dialog box. Check the option that says "Print as Image." Since you cannot download these "fonts," you must
Searching the web for direct downloads of "F1 font" or "F4 font" leads to highly suspicious websites. Because F1 and F4 are structural placeholders rather than actual font files (like Arial or Times New Roman), websites promising a "free link download" for them are often deceptive. Clicking these links risks downloading: bundled into executable (.exe) files. Click the Advanced button in the print dialog box
Because these labels are unique to each individual document, Why Is Your PDF Showing a CID Font Error?