Here is a explaining what these are, how to extract them, and where to legally obtain equivalent free fonts.
These are "virtual" or "alias" names generated by software (like Adobe InDesign, Word, or Illustrator) during the PDF creation process. The "+" Sign CID font F1 F2 F3 F4 F5 F6 F7 Fonts Free Download
Because these names are internal placeholders, you cannot "download" them as a specific font family like Arial or Times New Roman. However, you can fix the errors they cause by identifying and substituting the original fonts. Common Mappings for CIDFont F1–F7 Here is a explaining what these are, how
: Even if you install a font named "CIDFont+F1," it will likely not match the specific version required by your document, as the "F1" naming is randomized by the creator's software. How to Fix Font Errors (Instead of Downloading) However, you can fix the errors they cause
: CID (Character Identifier) fonts are a method of encoding that supports large character sets, often used for languages like Chinese, Japanese, and Korean.