/etc/pam.d/sudo is in sudo-ldap 1.8.10p3-1+deb8u5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | #%PAM-1.0
@include common-auth
@include common-account
@include common-session-noninteractive
|