Thanks to all.
It is indeed interesting. At least it shows that some Electrum server address is somehow detected as malicious because it was detected to run Coinminer which is a famous web browse mining apps if I remember it correctly. Maybe the owner of the server run its own web based mining apps or he apply that script for any request coming to his server (if that is even possible), so his client needs to run Coinminer first before his request got confirmed (not sure about this, just my speculation).
Thanks for the info.