Does the text in your document look like or blocks ?
in a specific program, or do you just need to be able to read and print it? CID+ Fonts - Adobe Community Cid Font F1 F2 F3 F4 Free Download
on macOS) and use "Export as PDF." This often flattens the font data into a more readable format. Embed Missing Fonts : If you have Adobe Acrobat Pro , you can use the Preflight Tool Does the text in your document look like or blocks
Since there is no "official" download for these names, you have to use workarounds to view or edit your files: Impossible fonts to be found / Fontes impossíveis de achar F4" are just Adobe’s internal placeholders.
To conclude, It does not exist as a standalone product. The "F1, F2, F3, F4" are just Adobe’s internal placeholders.