Qualcomm distributes QFIL through its official package. QFIL 2.0.1.1 is included inside QPST version 2.7.496 or newer. However, a public Qualcomm account is required.
(often identified as "Qualcomm HS-USB QDLoader 9008") to establish a connection. Version History qfil tool 2.0 1.1 download