Searching for a "CID font F1 F2 F3 F4 free download link" will typically lead to dead ends because these are not actual font names but placeholder labels
If you cannot install new software, try these techniques to recover your document: cid font f1 f2 f3 f4 free download link
These .msi files are for Windows and require an existing Adobe product license (free Reader qualifies). They will not install on macOS without workarounds. Searching for a "CID font F1 F2 F3
If you are trying to edit the text in Adobe Illustrator or Affinity Designer and are blocked by the missing font prompt, you will need to replace the text styling: Highlight the broken text blocks. Purchase/Download: MyFonts - Paperweight (Paid)
: Open the problematic PDF in a browser (like Chrome) or macOS Preview and "Export as PDF" or "Print to PDF." This often flattens the font data and makes the file usable in Illustrator or other editors.