1. An image forming apparatus that receives an image file transferred from an image supplying apparatus that is connected thereto via an interface to print image data in the image file, comprising: an information printing determining unit that determines whether embedded information that is information embedded into received image file is to be printed; an information analyzing unit that extracts the embedded information from the image file when it is determined by the information printing determining unit that the embedded information is to be printed; a storage unit that stores therein form data for preparing a form that includes an information-embedding area where extracted embedded information is to be arranged and an image-data area where the image data in the received image file is to be arranged; an image combining unit that reads the form data from the storage unit and generates a combined image by combining the extracted embedded information in the information-embedding area and the image data in the image-data area; and an image output unit that outputs the combined image to an image forming unit.