/usr/lib/x86_64-linux-gnu/libarchive.so.12 is in libarchive12 3.0.4-3+wheezy1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libarchive.so.12.0.4
/usr/lib/x86_64-linux-gnu/libarchive.so.12.0.4