We were given a picture of a pizza box. Using the command strings hiddenmsg.jpg | grep UMDCTF we can get the flag UMDCTF-{W3_ar3_th3_b3st_P1ZZ3r1a}.

Original writeup (https://github.com/keyboard-monkeys/ctf-writeups/blob/main/2021-UMDCTF/steganography_testudo's_pizza.md).