In general, it is not possible to extract a font from a PDF. However, there are some workarounds that may allow you to do this:
1. Try using a PDF editor such as Adobe Acrobat Pro or Foxit PhantomPDF. These programs may allow you to select and export fonts from PDFs.
2. If you have the original document that was used to create the PDF (e.g., a Word document), you can try extracting the font from that file instead.
3. Finally, if all else fails, you can try using an online tool like pdftops (part of the xpdf suite) to convert the PDF into PostScript format. Once in PostScript format, you may be able to use a program likeghostscript to extract the fonts used in the file.