That particular table border feature can only be done in a Word table if there is actually two rows and a hidden horizontal border between them. This is then problematic for actually typing content into the cells so it would need to be on a different layer so the user would type into something that overlays the table in the background.

The red text of text in line with the thicker top border is another feature that would require layers of content to reproduce and isn't really easy to do in Word.

I am 99.9% sure that the sample you posted was NOT created in Word. Adobe Acrobat has good features to set these comb-divided fields - although the text entered not aligning with the white spaces indicates that it might not have been used here either.

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Andrew Lockton
Chrysalis Design, Melbourne Australia