Jonny Odermatt uses his phone for all his online activities. Not just the personal ones, but also for tasks at work. He has won several prizes in a variety of competitions, so he is always on the lookout for new opportunities whenever they arise.
An attacker has picked Jonny as the target and is aware of his liking of competitions. So he stages a fake competition to seize control of Jonny’s telephone. To do this, he creates a forged invitation with a QR code that needs to be scanned using a smartphone: “Scan the QR code now to enter the draw for a trip round the world.” But the attacker has added malware to the QR code so that he can take control of Jonny’s phone as soon as the scan is complete.