"Having passed the lead back to Kimi, Lewis repositioned, moving his car across and behind Kimi to the right-hand line.
"He then outbraked him into the hairpin. We intend to appeal."
It is now up to the FIA Court of Appeal to determine whether McLaren have grounds to pursue their complaint, otherwise it will simply be withdrawn.
The McLaren spokesman said: "We looked at all our data, and also made it available to the FIA stewards.
"It showed that, having lifted [off the accelerator], Lewis was 6kph slower than Kimi as they crossed the start-finish line.
"Based on this data, we have no option other than to register our intention to appeal.
"We are a racing team and we will now focus on Monza (the Italian Grand Prix next Sunday), with a view to extending our lead in the drivers' world championship."
Asked prior to the penalty whether he would be surprised if the stewards did punish him, Hamilton replied: "If there's a penalty, then there's something wrong because I was ahead going into that corner, so I didn't gain an advantage from it.
"We were still able to race at the next corner and I gave him his spot back, and I think it was fair and square."
Ferrari team principal Stefano Domenicali was thrilled with the turn of events, however, saying: "I have often said the race is not over until the official results are published and that was the case today."