/usr/lib/dx/lib_linux/libDXcallm.so.4.0.44 is in libdx4 1:4.4.4-10build2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/dx/lib_linux/../../libDXcallm.so.4.0.44
/usr/lib/dx/lib_linux/../../libDXcallm.so.4.0.44