/usr/share/php/ is in php-horde-pdf 2.0.7-3ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/.registry/
/usr/share/php/.registry/.channel.pear.horde.org/
/usr/share/php/.registry/.channel.pear.horde.org/horde_pdf.reg
/usr/share/php/Horde/
/usr/share/php/Horde/Pdf/
/usr/share/php/Horde/Pdf/Exception.php
/usr/share/php/Horde/Pdf/Font/
/usr/share/php/Horde/Pdf/Font/Courier.php
/usr/share/php/Horde/Pdf/Font/Courierb.php
/usr/share/php/Horde/Pdf/Font/Courierbi.php
/usr/share/php/Horde/Pdf/Font/Courieri.php
/usr/share/php/Horde/Pdf/Font/Helvetica.php
/usr/share/php/Horde/Pdf/Font/Helveticab.php
/usr/share/php/Horde/Pdf/Font/Helveticabi.php
/usr/share/php/Horde/Pdf/Font/Helveticai.php
/usr/share/php/Horde/Pdf/Font/Symbol.php
/usr/share/php/Horde/Pdf/Font/Times.php
/usr/share/php/Horde/Pdf/Font/Timesb.php
/usr/share/php/Horde/Pdf/Font/Timesbi.php
/usr/share/php/Horde/Pdf/Font/Timesi.php
/usr/share/php/Horde/Pdf/Font/Zapfdingbats.php
/usr/share/php/Horde/Pdf/Writer.php