Investigators believe an unknown man approached the woman in a dark grey four-wheel-drive utility and pulled over at the side of the road.
The man threatened the woman and made demands for her to get in his vehicle.
The woman refused to comply and told him she would take a photo of his car, which startled the man as he drove away at a fast speed.
The woman walked home and later reported the matter to police.
Investigators are working to establish the circumstances surrounding the incident and have released a digital face composite image of a man as part of their investigation.
The man is perceived to be Caucasian in appearance with sandy blond/light brown hair and was wearing a high visibility t-shirt and blue polarised sunglasses.
He was driving a dark grey four-wheel-drive dual cab utility with a canopy on the back at the time.
Detectives urge anyone who recognises the man or with information to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au