“QR phishing attacks are on the rise because they require so little effort to be successful. For one, the codes are physical displays, meaning a harmless one can easily be covered with a nefarious one that brings users to a malicious website. This makes it easy for cybercriminals to ‘display’ the legitimate site that steals login credentials or installs malware.”
Source: Hackers Use QR Codes to Steal Your Money – TheStreet