Are those Hack tools for iPhone full of malware?

As you all know there are tons of those iphone cheat tools around. I recently came across a few articles claiming those hack engines to be malicious software.
There are even some blogs around (Like: www.cheatbee.com )which only publish iPhone Hacks and Cheats without download Tools and they are telling to be carefull downloading stuff on your iPhone.
Is this true? And how can i see if a already have malware on my iphone?

Some are, after all they are created by unscrupulous people.

On another note. Some hacks can be so badly written they have in the past bricked phones.

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