Is it common to include author without any contribution in a paper?
No, it is not ethical.
Yes, it is common.
Particularly for countries that have requirements on absolute number of papers to be published by grad students prior to graduation, this is a relatively common practice. Many journals now ask for the authors to explicitly list what was each author's contribution to the article, but of course this is also quite easily padded.
A question to consider, however, is whether or not these other authors had any contribution to your project you're not aware of. For example, if you are doing experimental work, perhaps they built the system you use to acquire your data - even if they have no idea about your data or experiments. In these cases some argument could be made for their inclusion. Whether that's true or not in your case is up to you.
As to what to do about it, if you have a good relationship with your advisor, ask him why they are being added using the most neutral language you can find. They may have some very good reason for adding them. If you don't agree, you can voice your disagreement and go from there. If you have a poor relationship with your advisor, you probably will just have to accept it and move on. I don't recommend secretly or &quot;accidentally&quot; going against your advisor's wishes since this will likely backfire, and they will in any case simply correct it at the proof stage.