/usr/lib/x86_64-linux-gnu/perl5/ is in libb-utils-perl 0.27-1build1.
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/B/
/usr/lib/x86_64-linux-gnu/perl5/5.22/B/Utils/
/usr/lib/x86_64-linux-gnu/perl5/5.22/B/Utils/Install/
/usr/lib/x86_64-linux-gnu/perl5/5.22/B/Utils/Install/typemap
/usr/lib/x86_64-linux-gnu/perl5/5.22/B/Utils/Install/Files.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/B/Utils/Install/BUtils.h
/usr/lib/x86_64-linux-gnu/perl5/5.22/B/Utils/OP.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/B/Utils.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/B/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/B/Utils/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/B/Utils/Utils.so