An XLX file which I think "file" detected correctly, although it's not entirely clear from the output
x1_1_vxp.xlx (application/octet-stream), 21.87 KB, created by Tim Jackson on 2008-09-25 13:46:48 UTC
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Creator: Tim Jackson
Created: 2008-09-25 13:46:48 UTC
Size: 21.87 KB

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Attachments on bug 463809: 317687 | 317688 | 319651