It’s not just mainstream computers that are affected by malware but your humble iPhone can also be affected by malware and there maybe a few pointers that may lead to confirm malware is affecting your iPhone.
If your iPhone is suffering from faster battery draining, strange pop-up ads or just behaving stranger than normal then there is a chance its been infected with malware according to Antivirus.com
Luckily this article gives you some clues on how to check your iPhone is indeed infected..