You can add some CSS to the box... it's going to be a trial and error kind of thing to play with.
Code:
<div style="float:right; width:100px; height:30px; position:relative; top:-10px; left:-10px;"><img src="path/to/image.jpg" alt="alt text" /></div>
First change the height and width the the height and width in pixels of your image. Then play with the values of top and left to see if you can get it where you want.
There's no way to just know what code will work for you from a screenshot.