Recently my Kaspersky Antivirus show me a warning when I visit my own site. It shows me some kind of iFrame infected warning. After some research and found that my index.php has been compromised.
If you have the same problem, check your index file if you see similar code like this:

<script language=javascript>document.write(unesc ape(%3C…..”
or
<script>eval(unescape(”%77 …..”
Take immediate action [...]

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