The CIA said it referred the matter to the proper authorities, but would not comment further.
The hacker spoke to the New York Post, which described him in an article published Sunday as "a stoner high school student," motivated by his opposition to U.S. Foreign policy and support for Palestinians. His Twitter account, @phphax, includes links to files that he says are Brennan's contact list, a log of phone calls by then-CIA deputy director Avril Haines, and other documents.
One document purporting to come from Brennan's AOL email account contains a spreadsheet of people, including senior intelligence officials, along with their pension identification numbers, although the hacker redacted the numbers in the version he posted on Twitter. It's unclear why Brennan would have stored such a document in his private email account. Based on the titles, the document appears to date from 2009 or before.
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The hacker told the Post he had obtained a 47-page version of Brennan's application for a security clearance, known as an SF86. That document millions of which were stolen from the federal personnel office last year by hackers linked to China contains detailed information about past jobs, foreign contacts, finances and other sensitive personal details.