Mail system refuses to send PDF: Pdf.Exploit.CVE_2017_2957-5633730-0

Hi,

In FrameMaker I had created a PDF without any scripting or macro content.

When I wanted to send it to an external contact, the mail system stopped the e-mail with this message:

Pdf.Exploit.CVE_2017_2957-5633730-0

I found this message only on this site:

https://lists.archive.carbon60.com/clamav/virusdb/69282

This is the first time that I got such a message.

I saved the PDF as an optimized PDF and discarded some items which could have an impact. However, I do not know, if this was correct. It seems that the mail server let the e-mail pass now.

Is there anything which I should check in the Preflight tool?

Best regards

Winfried