/usr/share/php/Horde/ is in php-horde-prefs 2.7.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Horde/Prefs/
/usr/share/php/Horde/Prefs.php
/usr/share/php/Horde/Prefs/Cache/
/usr/share/php/Horde/Prefs/Cache/Base.php
/usr/share/php/Horde/Prefs/Cache/HordeCache.php
/usr/share/php/Horde/Prefs/Cache/Null.php
/usr/share/php/Horde/Prefs/Cache/Session.php
/usr/share/php/Horde/Prefs/CategoryManager.php
/usr/share/php/Horde/Prefs/Exception.php
/usr/share/php/Horde/Prefs/Identity.php
/usr/share/php/Horde/Prefs/Scope.php
/usr/share/php/Horde/Prefs/Storage/
/usr/share/php/Horde/Prefs/Storage/Base.php
/usr/share/php/Horde/Prefs/Storage/File.php
/usr/share/php/Horde/Prefs/Storage/Imsp.php
/usr/share/php/Horde/Prefs/Storage/KolabImap.php
/usr/share/php/Horde/Prefs/Storage/Ldap.php
/usr/share/php/Horde/Prefs/Storage/Mongo.php
/usr/share/php/Horde/Prefs/Storage/Null.php
/usr/share/php/Horde/Prefs/Storage/Sql.php
/usr/share/php/Horde/Prefs/Translation.php