This specific file, , is a "cracked" or pirated version of the Goodnotes 5 application for macOS. The notation in the filename indicates:
The official app allows you to safely sync your notes across iPhone, iPad, and Mac via iCloud. GoodNotes 5.9.8 MAS [HCiSO].dmg
If you are looking for Goodnotes, it is highly recommended to use the official channels to ensure you receive updates and security patches. This specific file, , is a "cracked" or