SYSTEM AND COMPUTER-IMPLEMENTED METHOD FOR DETECTING DIGITAL FORGERIES IN PDF DOCUMENTS

System and computer-implemented method for detecting digital forgeries in PDF documents, the method comprising: receiving (104) an input document d0 (102) in PDF format; analyzing (106) the input document d0 (102) to detect incremental updates (108); iteratively selecting (110) a number i of incremental updates last included in the input document d0 (102), and for each iteration: obtaining (112) a previous version di (114) of the input document d0 (102) by removing the selected number i of last incremental updates (108) from the input document d0 (102); detecting (116) visual differences between the input document d0 (102) and the previous version di (114); and detecting (128) regions ri (120) in the documents (d0,di) containing the visual differences; and providing (124) the regions ri (120) detected in at least one iteration as an output (212).