/usr/share/perl5/EBox/Squid/Model/ is in zentyal-squid 2.3.3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/EBox/Squid/Model/AntiVirusBase.pm
/usr/share/perl5/EBox/Squid/Model/ApplyAllowToAllBase.pm
/usr/share/perl5/EBox/Squid/Model/ApplyAllowToAllExtensions.pm
/usr/share/perl5/EBox/Squid/Model/ApplyAllowToAllMIME.pm
/usr/share/perl5/EBox/Squid/Model/ContentFilterThreshold.pm
/usr/share/perl5/EBox/Squid/Model/DefaultAntiVirus.pm
/usr/share/perl5/EBox/Squid/Model/DelayPools1.pm
/usr/share/perl5/EBox/Squid/Model/DelayPools2.pm
/usr/share/perl5/EBox/Squid/Model/DomainFilter.pm
/usr/share/perl5/EBox/Squid/Model/DomainFilterBase.pm
/usr/share/perl5/EBox/Squid/Model/DomainFilterCategories.pm
/usr/share/perl5/EBox/Squid/Model/DomainFilterCategoriesBase.pm
/usr/share/perl5/EBox/Squid/Model/DomainFilterFiles.pm
/usr/share/perl5/EBox/Squid/Model/DomainFilterFilesBase.pm
/usr/share/perl5/EBox/Squid/Model/DomainFilterSettings.pm
/usr/share/perl5/EBox/Squid/Model/DomainFilterSettingsBase.pm
/usr/share/perl5/EBox/Squid/Model/ExtensionFilter.pm
/usr/share/perl5/EBox/Squid/Model/ExtensionFilterBase.pm
/usr/share/perl5/EBox/Squid/Model/FilterGroup.pm
/usr/share/perl5/EBox/Squid/Model/FilterGroupAntiVirus.pm
/usr/share/perl5/EBox/Squid/Model/FilterGroupApplyAllowToAllExtensions.pm
/usr/share/perl5/EBox/Squid/Model/FilterGroupApplyAllowToAllMIME.pm
/usr/share/perl5/EBox/Squid/Model/FilterGroupContentFilterThreshold.pm
/usr/share/perl5/EBox/Squid/Model/FilterGroupDomainFilter.pm
/usr/share/perl5/EBox/Squid/Model/FilterGroupDomainFilterCategories.pm
/usr/share/perl5/EBox/Squid/Model/FilterGroupDomainFilterFiles.pm
/usr/share/perl5/EBox/Squid/Model/FilterGroupDomainFilterSettings.pm
/usr/share/perl5/EBox/Squid/Model/FilterGroupExtensionFilter.pm
/usr/share/perl5/EBox/Squid/Model/FilterGroupMIMEFilter.pm
/usr/share/perl5/EBox/Squid/Model/GeneralSettings.pm
/usr/share/perl5/EBox/Squid/Model/GlobalGroupPolicy.pm
/usr/share/perl5/EBox/Squid/Model/GroupPolicyBase.pm
/usr/share/perl5/EBox/Squid/Model/MIMEFilter.pm
/usr/share/perl5/EBox/Squid/Model/MIMEFilterBase.pm
/usr/share/perl5/EBox/Squid/Model/NoCacheDomains.pm
/usr/share/perl5/EBox/Squid/Model/ObjectGroupPolicy.pm
/usr/share/perl5/EBox/Squid/Model/ObjectPolicy.pm
/usr/share/perl5/EBox/Squid/Model/Report/
/usr/share/perl5/EBox/Squid/Model/Report/RequestsGraph.pm
/usr/share/perl5/EBox/Squid/Model/Report/TrafficDetails.pm
/usr/share/perl5/EBox/Squid/Model/Report/TrafficReportOptions.pm
/usr/share/perl5/EBox/Squid/Model/Report/TrafficSizeGraph.pm
/usr/share/perl5/EBox/Squid/Model/UseDefaultDomainFilter.pm
/usr/share/perl5/EBox/Squid/Model/UseDefaultExtensionFilter.pm
/usr/share/perl5/EBox/Squid/Model/UseDefaultMIMEFilter.pm