/usr/share/fonts-materialdesignicons-webfont/fonts/materialdesignicons-webfont.eot is in fonts-materialdesignicons-webfont 1.4.57-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/fonts-materialdesignicons-webfont/fonts/../../fonts/eot/materialdesignicons-webfont/materialdesignicons-webfont.eot