Does this song have music copied/used from a classical music piece?

I'm just curious, I'm not too familiar with scales and which ones they
exactly are on guitar but I can still recognize that they are scales
in songs. I'm learning this song
http://www.youtube.com/watch?v=JQ0AH7G2x7k and around the middle (at
2:40) and past it sounds like something from a classical piece. Is it?