What is this hacker trying to do?

Question

If you do a search for:

http://www.google.co.uk/search?q=0x57414954464F522044454C4159202730303A30303A313527&hl=en&start=30&sa=N

you will see a lot of

Answer 1

That is a hex string. When you translate it, it translates into: "WAITFOR DELAY '00:00:15'"