/usr/share/doc/libbobcat4-dev/man/index.html is in libbobcat-dev 4.01.03-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libbobcat4-dev/man/bobcat.7.html
/usr/share/doc/libbobcat4-dev/man/bobcat.7.html