/usr/share/maven-repo/com/twelvemonkeys/imageio/imageio-pnm/debian/imageio-pnm-debian.jar is in libtwelvemonkeys-java 3.3.2-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/com/twelvemonkeys/imageio/imageio-pnm/debian/../../../../../../java/imageio-pnm.jar