/usr/lib/x86_64-linux-gnu/libinjeqt.so is in libinjeqt-dev 1.1.0-1.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libinjeqt.so.1
/usr/lib/x86_64-linux-gnu/libinjeqt.so.1