/usr/share/perl5/EBox/Squid/Composite/ is in zentyal-squid 2.3.3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/EBox/Squid/Composite/DelayPools.pm
/usr/share/perl5/EBox/Squid/Composite/Domains.pm
/usr/share/perl5/EBox/Squid/Composite/Extensions.pm
/usr/share/perl5/EBox/Squid/Composite/FilterGroupDomains.pm
/usr/share/perl5/EBox/Squid/Composite/FilterGroupExtensions.pm
/usr/share/perl5/EBox/Squid/Composite/FilterGroupMIME.pm
/usr/share/perl5/EBox/Squid/Composite/FilterGroupSettings.pm
/usr/share/perl5/EBox/Squid/Composite/FilterGroupTabs.pm
/usr/share/perl5/EBox/Squid/Composite/FilterSettings.pm
/usr/share/perl5/EBox/Squid/Composite/FilterTabs.pm
/usr/share/perl5/EBox/Squid/Composite/General.pm
/usr/share/perl5/EBox/Squid/Composite/MIME.pm
/usr/share/perl5/EBox/Squid/Composite/Report/
/usr/share/perl5/EBox/Squid/Composite/Report/TrafficReport.pm