/usr/share/java/unoil.jar is in libreoffice-java-common 1:5.2.7-1+deb9u5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/unoil-5.2.7.jar
/usr/share/java/unoil-5.2.7.jar