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An aggressive rabbit has learnt to bite and scratch in order to avoid being picked up. Be aware that your rabbit is doing this out of fear and unease around humans. Gradually gain your rabbit's trust. Don't try forcing your rabbit to cuddle or sit in your lap. Hiding can decrease his stress levels, so he may feel comforted knowing that he has lots of places to hide. This will also make your rabbit feel more secure. At first, do not attempt to handle him, but offer treats (you can even feed him dandelions!) so that he associates tasty foods with human company. Sit down beside the hutch every day, talking in a soothing voice and giving treats, so he learns humans are no threat. You can offer several kinds of fruits to your rabbit, such as grapes, apples, blueberries, and raspberries. Be sure to only give a very small amount, like a single grape or a couple of raspberries. As your rabbit starts to venture out of his hiding place for treats, try to touch him briefly while he eats a treat. As the days and weeks go by, increase the amount of time you touch him until he's comfortable. Then you can try to entice him onto your lap (seated on the ground of course). This is also a great way of gaining a timid, frightened rabbit's trust.
Avoid handling a rabbit that's biting or scratching. Provide plenty of hiding places for your rabbit. Start keeping your rabbit company. Begin interacting gradually.