or malware then maybe the virus I reported What about the malware called Mac defender?
As eww has said, that is not a virus. If you had read the malware guide I referred you to earlier, you'd know what the difference is, and in any case, presence of Mac malware is irrelevant to the point here.
If you don't consider it a virus then how do you explain
JS.Obfus-48 and Heuristic.Phishing.email.SpoofedDomain.being discovered by Clamxav?
Because ClamXav finds LOADS more than just Mac viruses. Most of what's in its database is Windows malware. You've already been told that those two items aren't even malware in the first place. The first is for obfuscating a link to trick you into downloading something else, but it itself is not malware. You got it in your browser cache after visiting a dodgy or hacked site. The latter is simply a phishing e-mail, nothing more.
Why is there several Virus software in th Mac app store?
Because there is malware for the Mac, which nobody here has denied. That's not the point. You're hung up on two specific items that are definitively NOT Mac malware!
Read the guide I referred you to earlier. You need education on this topic.