This is the most significant risk. Many of these modded APKs are packed with malware. Security researchers have found that such files can request dangerous permissions. For example, a "Netflix Premium" mod was found to contain code that allows it to execute after a reboot, request permission to draw over other apps, and encode/decode base64 strings—all classic signs of malicious intent. In some cases, fake Netflix apps have been used to distribute "bank-draining" malware designed to steal financial information.
The primary danger of downloading modified software is the lack of a security vetting process. Unlike official apps, MOD APKs are not scanned for malicious code. Common risks include: This is the most significant risk
If you want, I can help with lawful alternatives—choose one: For example, a "Netflix Premium" mod was found
Users are promised access to content libraries from all regions around the world, effectively bypassing geo-restrictions. Unlike official apps, MOD APKs are not scanned