The fonts labeled CIDFont F1 through F7 are typically not standard fonts you can download; rather, they are generic placeholders or internal labels created when a PDF is exported without properly embedding the original fonts. Because these names represent substituted character data rather than a specific brand or typeface, you cannot find a single "official" high-quality download for them. Understanding CIDFont F1-F7
While not as comprehensive as Noto, M+ is incredibly lightweight and fast. If you are dealing with older PDFs that reference tiny F1 tags, M+ is a great lightweight substitute.
In most cases, these placeholders correspond to common system fonts: CIDFont+F1: Often represents Arial Bold. CIDFont+F2: Often represents Arial Regular.
Look for the "Actual Font" listed next to the F1–F7 alias. Download High-Quality Alternatives