The smaller one is corrupted. That’s the way it arrived in the eWon email.
You should be able to open the second one with winar, 7zip, or winzip.
"This electronic mail (including any attachments) may contain information that is privileged, confidential, and/or otherwise protected from disclosure to anyone other than its intended recipient(s). Any dissemination, copying, or use of this electronic email
or its contents by persons other than the intended recipient(s) is strictly prohibited. If you have received this message in error, please notify us immediately by reply email or telephone call so that we may correct our internal records. Please then delete
the original message in its entirety. Thank you.”