/usr/share/doc/libclamav-dev/BUGS is in libclamav-dev 0.99+dfsg-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libclamav-dev/../libclamav7/BUGS
/usr/share/doc/libclamav-dev/../libclamav7/BUGS