Well, as it's the first year it isn't quite as terrible as it might be for the second or third year. It depends if you need to do well - If it's going to affect things like placement opportunities, then speak up. If you're not assessed in your first year, you could just let it slide.
You could also contact the module leader and let them know your position - Sometimes they will just give everyone individual consideration and thus, they'll score a lot lower (if at all). You'll be given more marks and they'll see that you had to do more and probably mark you on work achieved instead of the entire project.
The alternative, which I did when compiling a report (12 members in the group, half of that actually offered something to it) was write at the top "These people contributed to the report".