When using john to crack Windows LM hashes it says it has cracked the passwords but does not display anything. See image below.
closed as off-topic by ThoriumBR, Tobi Nary, Bacon Brad, TheJulyPlot, Stephane Sep 22 '17 at 12:02
- This question does not appear to be about Information security within the scope defined in the help center.
You're not seeing them because they're invisible. :)
aad3b435b51404eeaad3b435b51404ee (LM) and 31d6cfe0d16ae931b73c59d7e0c089c0 (NTLM) correspond to an empty password.
This blog post explains in a little more detail, with command line examples to show how an empty password is hashed.