You can place it in InDesign using File > Place, but if the original Word file was not large enough to accommodate bleed, you cannot easily add it after the fact.
What you can do is slightly enlarge the placed file to allow the edges to bleed. Not ideal, but probably your best solution outside of rebuilding the PDF in a size that takes the bleed requirement into consideration.
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[EDIT] Sorry this was a provisional answer as you may not have set the bleed up... Whilst you could have done this in InDesign my logic was that it might have been easier in Acrobat as it already is a PDF.
In which case you first need to set up a bleed box and then add the various printer marks
Follow the links below in the order they are presented making relevant changes for your document where necessary.
This should work for you.
[EDIT] You need to search for print production in the right hand toolbar in acrobat in modern versions.. by clicking on this you will be shown additional options including "Add Printer Marks".