Adobe not recognising password protected document - Services API

Hi,

I have a document that has master/permissions restrictions, such as not being allowed to copy or print without the password. However, the response from the services API doesn't recognize that the document is encrypted. (API response attached)

Please let me know if you can think of a solution, been trying to solve this for weeks!

Example encrypted document also attached (not allowed to copy & print). Password: 1234567