Jumpline resides at myhostcenter.com, as far as I can tell. Perhaps they are a reseller or something.
This is malware.
And from what I can tell, what it is attempting to do is this:
If you google “Siktim Ebeniii,” you’ll find a bunch of other sites that have been hacked this way.
Usually, these kinds of attacks happen as a result of not having up-to-date software. But they also happen because of unsafe server settings and since most of these compromised sites seem to be related to myhostcenter.com, I think the latter is a reasonable suspicion. This happened a few years back with a hosting provider called “Network Solutions” and in fact, Godaddy was attacked pretty hard recently, if I recall correctly.