The Saudi Arabian KC-130 are possible but not the best aircraft for this job. The KC-130 can't reach the cruise altitude for jets.
There are also about 20 KC-135 able to accept wing mounted refueling pods. A boom adapter looks differently.
According to the drogue it could be an A330-MRTT:
http://leehamnews.files.wordpress.com/2009/11/mrtt_2.jpg (bigger)
The United Arab Emirates have 1 operational A330-MRTT, the RAF 9 Voyagers and Australian RAAF has 5 operational KC-30A.
Very likely the picture was taken from an Australian KC-30A.