Is there something hidden in these images? I can't tell...

1.png ae65b8ebaaa1456e319591ea8e80b342 66K
2.png 038db134eb05ece0b56bc0d4abcaaa40 56K
3.png 162a03381ad4fdb9471767fb48e9b1f5 66K

This problem is from DMOJ Capture The Flag '20. For more details, please view the contest page.