In the context of PDF files, , F2 , F3 , and F4 are not specific font "brands" you can download, but rather internal placeholder names generated by software during the PDF export process.
In the context of PDF documents and design software like Adobe Illustrator, are typically not specific "fonts" you can choose for style, but rather generic placeholders or internal identifiers for fonts that were not properly embedded when a file was created. Understanding the Difference cid font f1 f2 f3 f4 better
A frequent pitfall: the PDF’s text uses Identity-H (vertical, 2-byte CIDs), but the CMAP expects another standard. Run a validation: In the context of PDF files, , F2
If you are seeing these names because of a "Font Missing" error, try these workarounds to improve your document: Import, Don't Open : Instead of opening the PDF directly in Illustrator, Run a validation: If you are seeing these
Each CID font is identified by a (e.g., Adobe-Japan1-6 ).