- Open the PDF file in Adobe Acrobat Professional
- Select the View menu item, then Tools and Print Production. This will give a list of tools.
- Click Output Preview.
The resulting palette shows the Simulation Profile, which gives the name of an ICC Colour Profile. It must have the words Output Intent and then the name of the ICC Profile, e.g. Output Intent: ISOnewspaper26v4, meaning this is the output intent applied to this PDF file.
If the words Output Intent are not present, then the PDF does not have an output intent applied.