this might be a simple question, but can a monster attached with premature burial be destroyed by a monster with the same attack? is the only way to destroy that monster is by destroying pre-burial? can someone explain the rulings on the card for me. Thank you

A monster brought back via Premature Burial is still a monster and can be destroyed in any regular fashion be it through battle, or effect. Premature Burial only add the condition that if Premature Burial is destroyed, so is the monster, thats all.

it can be destroyed in battle, but the difference is that the monster can be destroyed by destroying premature burial. NOTE: destroying PM isn't the same as removing it from the field. (ie giant trunade will take PM off the field, but the monster will remain)