Auto post Spams on my wordpress blog?

You have malware, either by downloading a free theme with malware in it or someone exploited your site.

Verifying that I have fully removed a WordPress hack?

http://codex.wordpress.org/FAQ_My_site_was_hacked

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)