Please see how to add our PDF widget - http://hc.imcreator.com/en/articles/2858603-how-to-add-widgets
Please make sure to insert the link in the following format: https://drive.google.com/file/d/1ABrDv7BlIFMR58b7PlVkOOPyqLxt-wHW/preview. To embed another PDF, just replace the code '1ABrDv7BlIFMR58b7PlVkOOPyqLxt-wHW' with your own code.