When you have access to the name of those PDF files in your data you could use the Dynamic Section Background option to point to the respective files on disk and dynamically set them as section background. This automatically creates a page for each page in the PDF.
Right click the section in the Resources panel and choose Dynamic Background. Set the Path to the folder holding your images and use the Fields controle to construct the name to the file based on your data field.
In the example above the ‘image’ fields holds the full name. In case you only have the basename you could add the file extension in the suffix field (.pdf).
Other data can be placed in a positioned boxes. Either create a box using the Positioned Box icon on the toolbar or drag and drop a data field with the Ctrl key pressed. This creates a positioned box with the placeholder for the data field (expression).
Hope this helps,