"This hack is a response to the rocket attacks of Pakistan military on Kunar and Jalalabad Provinces of Afghanistan!" Hacker left the same message used in previous attacks against Pakistan.
The website appears to be using outdated wordpress version. However, Speaking to E Hacking News, hackers claimed that they have used some different method to compromise the website.
The group also claimed to have breached more than 300 Pakistani websites and defaced them. It includes few Educational websites.
The full list can be found here : http://pastebin.com/Wsbiv7EJ