Where can I get a clean OS X Mavericks for VirtualBox?

Hello :)

I've been searching to download official OS X, preferably Mavericks to use it on VirtualBox.

The thing is that I can find many links, but some of them I have downloaded contains viruses... And the others, well i just don't trust them since the website i got it from is shady -.-

Do you guys know where I can find a clean OS X Mavericks ISO file to download? :)

submitted by /u/naxster921
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