Automatic add post with junk character

I am running a website, the problem with me is that whenever I add any new post in my blog I found that one more post added without publish in background. I have check WP version, plugin and themes. I have scan my blog at sururi, norton and hacker ninja. Hence no result. Any help!!!

Deactivate all plugins, then check again… you can do a glance to your Database if there is any Revisions / Auto Updates…etc