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OP: "...But still it seems to me that a lot of editing was involved (colors  especially). Is it possible to say what has been done in Photoshop?..."

In my experience, the lighting is absolutely the foundation of photos like this.  If the lighting is right, one can obtain colors like this by doing no more than pushing a couple of sliders around in ACR, hardly what I would call extensive photoshopping. 

Once the overall exposure, contrast, general level of saturation, and a neutral white is established in ACR, my guess is that a moderate reduction of the yellow saturation in ACR (...and maybe increasing it's luminosity slightly) is about all that is needed to get SOOC (straight-out-of-the-camera) photo to look like this.

Tom M