Cid Font F1 F2 F3 F4 F5 F6 F7 Fonts Free Download Work Info

Some PDFs do not reference the full CID font; they embed only the used glyphs. If the subset is malformed, no external font helps.

Solution: Use pdftocairo (Linux) or Adobe Acrobat’s "Preflight" tool to re-embed missing fonts. cid font f1 f2 f3 f4 f5 f6 f7 fonts free download work

sudo apt update
sudo apt install fonts-noto-cjk
sudo apt install fonts-adobe-source-han-sans-cn fonts-adobe-source-han-serif-cn
fc-cache -fv

Then, edit /etc/fonts/local.conf to define substitution rules: Some PDFs do not reference the full CID

<alias>
  <family>F1</family>
  <accept><family>Noto Serif CJK JP</family></accept>
</alias>

mutool extract document.pdf