/usr/lib/x86_64-linux-gnu/perl5/ is in libpdl-io-hdf5-perl 0.6501-2build2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/5.22/
/usr/lib/x86_64-linux-gnu/perl5/5.22/PDL/
/usr/lib/x86_64-linux-gnu/perl5/5.22/PDL/IO/
/usr/lib/x86_64-linux-gnu/perl5/5.22/PDL/IO/HDF5.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/PDL/IO/HDF5/
/usr/lib/x86_64-linux-gnu/perl5/5.22/PDL/IO/HDF5/Dataset.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/PDL/IO/HDF5/tkview.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/PDL/IO/HDF5/Group.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/PDL/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/PDL/IO/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/PDL/IO/HDF5/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/PDL/IO/HDF5/HDF5.so