/usr/lib/php5/20121212/libowphp.so.0 is in libow-php5 2.8p15-1ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/php5/20121212/libowphp.so.0.0.0
/usr/lib/php5/20121212/libowphp.so.0.0.0