The font CIDFont+F1 is Arial (blod) and CIDFont+F2 is Arial (Regular) PDFont - PDF Library API Reference - Adobe Open Source
The string "Cidfont-f1 F2 F3 F4 F5 F6" is a technical identifier representing a collection of six CID-keyed font resources within a digital document. It signifies a structure capable of handling large glyph sets—typically for CJK languages—ensuring that complex typography is displayed correctly and consistently across different platforms. For print professionals and software developers, recognizing this string helps in diagnosing font embedding issues or understanding the resource architecture of a PDF file. Cidfont-f1 F2 F3 F4 F5 F6
But what about ? That is not a standard foundry name. It suggests a placeholder name generated automatically by software when a true CID font is missing or when a system falls back to a generic CID handler. The font CIDFont+F1 is Arial (blod) and CIDFont+F2