This file is indexed.

/usr/lib/x86_64-linux-gnu/hdf5/serial/libhdf5hl_fortran.so is in libhdf5-dev 1.8.16+docs-4ubuntu1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/x86_64-linux-gnu/hdf5/serial/../../libhdf5_serialhl_fortran.so