I recorded a video based on Andrey7234i's description.
(Edit: Only public survival matches count for killing the Daru. If you are playing with other players , killling a daru will only count for the player who killed it.)
And a Big thanks to Koenigstefan91, who showed me how to kill the Daru in this way.
I hope that helps
If you vote negative, please write in the comments, what do you want to improve.