The most direct method is using the free online service provided by MuseScore. Conversion of .pdf to .mscz file - MuseScore
Converting a PDF of sheet music into an .mscz file—the native format for MuseScore —represents a fascinating bridge between static visual documentation and dynamic digital composition. While a PDF is essentially a "digital photograph" of music, an .mscz file contains semantic data that understands the relationship between notes, rhythms, and dynamics. The Challenge of Musical OCR convert pdf to mscz file