/usr/share/icons/hicolor/22x22/mimetypes/application-vnd.geogebra.file.png is in geogebra 4.0.34.0+dfsg1-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/icons/hicolor/22x22/mimetypes/../apps/geogebra.png