/usr/share/cowsay/cows/vader.cow is in cowsay 3.03+dfsg2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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## Cowth Vader, from geordan@csua.berkeley.edu
##
$the_cow = <<EOC;
$thoughts ,-^-.
$thoughts !oYo!
$thoughts /./=\\.\\______
## )\\/\\
||-----w||
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Cowth Vader
EOC
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