/usr/lib/x86_64-linux-gnu/libnetcf.so is in libnetcf-dev 1:0.2.8-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libnetcf.so.1.4.0
/usr/lib/x86_64-linux-gnu/libnetcf.so.1.4.0