/usr/share/java/tomcat8-util.jar is in libtomcat8-java 8.5.14-1+deb9u3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/tomcat8-util-8.5.14.jar
/usr/share/java/tomcat8-util-8.5.14.jar