Hi.. recently, I receive the 'unnatural inbound link' on the GWT. After that, all the main keyword missing from SERP. However, I still can see the optional keyword (keyword I not focus to rank) still rank well on SERP ( only main targeted is completely missing ) However,the same main keyword for subdomain web is still ranking well. So, that make me think, Is that penalty just for main keyword on rootdomain (homepage) Do building new page on (hxxp://root.com/newcustompages.php) is the good idea to rank the same main keyword that been penalty on main page? or just give-up all backlink using disavow link, send considerations for luck. What you think?