Published at Thursday, October 08th 2020, 10:37:36 AM by Tammi Wall. Iphone X. The Definition Of Malware? Malware includes viruses spyware rootkits Trojan horses keyloggers and adware. The best way to describe Malware is that it is a very broad classification of any kind of software that adversely affects your computer PDA or cell phone that has internet access (like an iPhone). Malware can sometimes slow your computer PDA or iPhone down - in the most extreme cases it can break into your personal data.