There are a plethora of Android apps that allow you to download videos and music files from popular websites such as YouTube, Instagram, Facebook, and more. Since doing that isn't exactly legal or sanctioned by Google, these applications live completely outside the Play Store, which means they lack any substantial malware protection. Some apps take advantage of this, and popular third-party downloader Snaptube turns out to be one of those. Security platform Secure-D has found evidence of fraudulent advertisement clicks in the background and unwanted, automatically created subscriptions which the owner of the phone has to pay for.

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