/usr/share/help/ja/evince/legal.xml is in evince-common 3.18.2-1ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/help/ja/evince/../../../help-langpack/ja/evince/legal.xml
/usr/share/help/ja/evince/../../../help-langpack/ja/evince/legal.xml