Open the PDF in a PDF editor
Select the image insertion or add image tool
Choose the image file from your device
Place the image on the desired page
Resize and position the image as needed
Save the updated PDF
Use a word processor with PDF export if needed
Insert images into the document before converting to PDF
Export or print the document as a PDF
Use online PDF editing tools if you do not have desktop software
Check the final PDF to confirm the images appear correctly