/usr/share/dx/samples/util/dxf/ is in dxsamples 4.4.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/dx/samples/util/dxf/MANIFEST
/usr/share/dx/samples/util/dxf/Makefile.sample
/usr/share/dx/samples/util/dxf/README
/usr/share/dx/samples/util/dxf/balloon.dxf
/usr/share/dx/samples/util/dxf/colors.c
/usr/share/dx/samples/util/dxf/common.c
/usr/share/dx/samples/util/dxf/dx.c
/usr/share/dx/samples/util/dxf/dxf.c
/usr/share/dx/samples/util/dxf/dxf.h
/usr/share/dx/samples/util/dxf/dxf_r12.txt
/usr/share/dx/samples/util/dxf/entity.c
/usr/share/dx/samples/util/dxf/entity.h
/usr/share/dx/samples/util/dxf/header.c
/usr/share/dx/samples/util/dxf/ignored.c
/usr/share/dx/samples/util/dxf/output_funcs.c
/usr/share/dx/samples/util/dxf/read.c
/usr/share/dx/samples/util/dxf/snag_funcs.c
/usr/share/dx/samples/util/dxf/table.c
/usr/share/dx/samples/util/dxf/tree.c
/usr/share/dx/samples/util/dxf/x29.dxf