/usr/share/perl5/Sbuild/ is in libsbuild-perl 0.64.1-1ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/Sbuild/AptResolver.pm
/usr/share/perl5/Sbuild/AptitudeResolver.pm
/usr/share/perl5/Sbuild/Base.pm
/usr/share/perl5/Sbuild/Build.pm
/usr/share/perl5/Sbuild/Chroot.pm
/usr/share/perl5/Sbuild/ChrootInfo.pm
/usr/share/perl5/Sbuild/ChrootInfoSchroot.pm
/usr/share/perl5/Sbuild/ChrootInfoSudo.pm
/usr/share/perl5/Sbuild/ChrootPlain.pm
/usr/share/perl5/Sbuild/ChrootRoot.pm
/usr/share/perl5/Sbuild/ChrootSchroot.pm
/usr/share/perl5/Sbuild/ChrootSetup.pm
/usr/share/perl5/Sbuild/ChrootSudo.pm
/usr/share/perl5/Sbuild/Conf.pm
/usr/share/perl5/Sbuild/ConfBase.pm
/usr/share/perl5/Sbuild/Exception.pm
/usr/share/perl5/Sbuild/LogBase.pm
/usr/share/perl5/Sbuild/Options.pm
/usr/share/perl5/Sbuild/OptionsBase.pm
/usr/share/perl5/Sbuild/Resolver.pm
/usr/share/perl5/Sbuild/ResolverBase.pm
/usr/share/perl5/Sbuild/Sysconfig.pm
/usr/share/perl5/Sbuild/Utility.pm
/usr/share/perl5/Sbuild/XaptResolver.pm