/usr/lib/x86_64-linux-gnu/perl5/ is in libapt-pkg-perl 0.1.33build1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/5.26/
/usr/lib/x86_64-linux-gnu/perl5/5.26/AptPkg/
/usr/lib/x86_64-linux-gnu/perl5/5.26/AptPkg/Cache.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AptPkg/Config.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AptPkg/Config.pod
/usr/lib/x86_64-linux-gnu/perl5/5.26/AptPkg/PkgRecords.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AptPkg/Policy.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AptPkg/Source.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AptPkg/System.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AptPkg/Version.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AptPkg/hash.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/AptPkg.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/AptPkg/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/AptPkg/AptPkg.so