You may ask if it's possible to create a rule that will automatically add the content of a ticket attachment into a private note in Kayako Classic. This article provides the answer to this concern.
We are sorry to inform you that the feature is currently not available and has been identified as a feature enhancement. We have conveyed the information to our product team already.
For agents, follow the Submitting a Feature Request - Agent Guide if you received such a request from a customer.