/usr/share/cowsay/cows/vader-koala.cow is in cowsay 3.03+dfsg1-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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## Another canonical koala?
##
$the_cow = <<EOC;
$thoughts
$thoughts .
.---. //
Y|o o|Y//
/_(i=i)K/
~()~*~()~
(_)-(_)
Darth
Vader
koala
EOC
|