Cidfont F1 F2 F3 F4 Gratis «4K»

In short: – they are ghosts left behind by missing typefaces.

CIDFont+F1 (and variants like F2, F3, F4) is typically not a standalone font you can download, but rather placeholder name generated by software when a PDF is exported Why You See These Names Font Substitution: cidfont f1 f2 f3 f4 gratis