/usr/lib/x86_64-linux-gnu/ is in libgd-perl 2.53-3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/
/usr/lib/x86_64-linux-gnu/perl5/5.24/
/usr/lib/x86_64-linux-gnu/perl5/5.24/GD/
/usr/lib/x86_64-linux-gnu/perl5/5.24/GD/Group.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/GD/Image.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/GD/Polygon.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/GD/Polyline.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/GD/Simple.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/GD.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/GD/
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/GD/GD.so
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/GD/autosplit.ix