PDFs exported directly from notation programs like Sibelius, Finale, or MuseScore convert with high accuracy (often 85% to 95% correct).
I notice you've put "convert pdf to mscz file" in quotes, as if asking about that specific phrase. convert pdf to mscz file
For musicians willing to spend 15 minutes setting up software, is the most powerful free OMR engine available. It converts PDF scans into MusicXML, which MuseScore can then open and save as MSCZ. PDFs exported directly from notation programs like Sibelius,