: For viewing, signing, and commenting on PDFs, you can use the official Adobe Acrobat Reader Acrobat Pro (Paid/Trial)

If you or an employee have already downloaded a file matching this description, take the following containment steps immediately:

files containing "keygens" or "cracks" from third-party sites is a common method for distributing ransomware and other malicious software. It is highly recommended to use current, supported software to protect your system from modern security threats. free alternatives

A completely free, privacy-focused desktop suite for merging, splitting, and compressing PDFs.

Use a dedicated, bootable USB malware scanner (like Kaspersky Rescue Disk or ESET SysRescue) to clean the drive before booting back into Windows.