The source file is not what it seems like - it is not an Excel-file nor a CSV-file.
The header indicates that it is DRM - protected and encrypted - so it has to be decrypted first before it is
usable. Then you can use it in Qlik Sense.
DRM = Digital Rights Managment
Probably copied in the wrong or unauthorized way from a SharePoint site with DRM-enabled.
From Samsungs website:
Document Security Solution (NASCA) NASCA is a DRM solution guaranteeing safe distribution of electronic documents with encryption and authority management features to take preemptive measures in preventing losses due to illegal leakages of all electronic documents created within the company.