I am going to steal a millionaire's bank account number, by injecting an advertisement into their computer, so I can be RICH!!!
Oh look! An advertisement! Let's see what it says!
CONGRATS! You have been selected to win a MILLION dollars. Enter your bank account number here to proceed.
This seems like a MALVERTISEMENT. A malvertisement is an advertisement that is capable of infecting somebody's computer with malware. It works its way into a webpage and spreads through a system unknowingly. I will Google how to combat it.
COMBATTING MALVERTISEMENTS: Experts recommend that users block all pop-up ads, by downloading anti-malware software.
YAY! After downloading the anti-malware software, nobody can try to hack my computer now!