/usr/lib/x86_64-linux-gnu/ is in libb-hooks-parser-perl 0.12-1+b2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/
/usr/lib/x86_64-linux-gnu/perl5/5.20/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/B/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/B/Hooks/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/B/Hooks/Parser/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/B/Hooks/Parser/Parser.so
/usr/lib/x86_64-linux-gnu/perl5/5.20/B/
/usr/lib/x86_64-linux-gnu/perl5/5.20/B/Hooks/
/usr/lib/x86_64-linux-gnu/perl5/5.20/B/Hooks/Parser.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/B/Hooks/Parser/
/usr/lib/x86_64-linux-gnu/perl5/5.20/B/Hooks/Parser/Install/
/usr/lib/x86_64-linux-gnu/perl5/5.20/B/Hooks/Parser/Install/Files.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/B/Hooks/Parser/Install/hook_parser.h