Apple already blocked the first malware for non-jailbroken iPhones
 

With certain exceptions, most iOS-focused malware targets jailbroken devices whose compromised security makes them easy prey. However, there's been concerns that a recent strain of malware, YiSpecter, can attack even 'pure' devices running stock iO...

http://www.engadget.com/2015/10/05/a...ecter-malware/