I didn't know you could check the logs of the player you attacked?
I can, and those logs show me that other players who were smaller then you are and about the same size as Jerico (inactive target) won more runes later on.
I also do see that you've been attacking him earlier as well and you only win 3 runes (at most)
Rune winnings are calculated where the size of the attacker does matter, so if you're bigger you win less then when you're smaller.
If you're the same size you might win 10% of his total runes at 100% victory.
If you're 70% bigger you might win 7% of his total runes at 100% victory.
This also explains why others won 12 or 10 runes when they hit Jerico after you and your clan did.
I hope this answers your question.
Your village is 38100% bigger than the defending village. You will probably lose 90 honour by attacking this village. If someone of your clan attacked this village earlier, every clan member will lose honour.