Unable to identify/extract Thai charecters using Automation Anywhere Tasks

Hi Team,

I have a Thai language pdf where i need to extract the data from PDF. But when i try to extract the data from that PDF i am getting boxes instead of Thai characters. I have tried multiple way to read the data from PDF like PDF extract text activity and converted pdf to image and extracted data from that PDF. In all the way the extracted data is showing as boxes.

Please suggest possible ways to extract/identify thai characters using automation anywhere.

Thanks in advance