/usr/lib/libxmlrpc_cpp.so.4 is in libxmlrpc-c++4 1.16.33-3.1ubuntu5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libxmlrpc_cpp.so.4.16
/usr/lib/libxmlrpc_cpp.so.4.16