The 2017 Nokia Threat Intelligence Report found that 68.5 percent of all malware infects Android mobile devices. By contrast, only 3.5 percent of malware targets iPhones and other mobile devices. (The remaining 28 percent of malware is designed to infect Windows devices and personal computers.)
According to the report, even though Google has made efforts to secure Android devices from hackers, the hackers continue to find ways to bypass Google's cybersecurity measures. The main reason Android devices are more vulnerable is because they allow "sideloading," meaning users can download and install apps from the Internet that have not been scanned or authenticated by the Google Play Store. In China, 96 percent of apps are purchased through third-party app stores.
Apple devices are much less vulnerable to malware. Apple's operating system is more secure, and Apple "sandboxes" apps, which prevents malware from spreading.
The report also states that mobile adware, mostly associated with ad-funded apps, is being used more aggressively by cybercriminals. "iPhone rarely targeted by malware: Nokia intelligence report," www.deccanchronicle.com (Nov. 20, 2017).