Most people look for the antichrist to be a visibly evil person, like Osama Bin Laden, Kim Jong Il, Bill Clinton, etc. But we know that the antichrist will put on the appearance of righteousness:
Matthew 24:24 (King James Version)
24For there shall arise false Christs, and false prophets, and shall show great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.
The antichrist will try to deceive us with good works.