CIDFont+F1 through F4 labels represent missing font data in PDFs, appearing when fonts were not properly embedded during file export, often acting as generic placeholders. Troubleshooting involves re-exporting the PDF to flatten layers, using Adobe Illustrator to replace fonts, or forcing embedding via Preflight. For more details, visit Adobe Community . Impossible fonts to be found / Fontes impossíveis de achar
Limitations: Acrobat may not fully rebuild CID subsets if the CMaps are severely corrupt. cid font f1 f2 f3 f4 repack