/usr/share/doc/qemu-kvm-extras-static/changelog.Debian.gz is in qemu-kvm-extras-static 1.0.50-2012.03-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/qemu-kvm-extras-static/../qemu-user-static/changelog.Debian.gz