Customers who receive a flight itinerary email from Jetstar containing PDF attachments have been advised to delete the email straight away.
A Jetstar spokesman confirmed to Computerworld Australia that the itineraries have not been issued by the airline and may contain a virus.
"Jetstar no longer sends itineraries as PDF attachments," the spokesman said in a statement. "When we send you an itinerary, all your flight details are included in the body of the email."
According to the spokesman, the only attachment included in an official Jetstar itinerary email is a PDF labelled Tax Invoice.
Jetstar is letting its customers know about the hoax emails via a recorded message on its helpline and an alert on its Facebook page.
The Facebook post includes the following:
Some people are again receiving fake Jetstar itinerary emails. These have NOT been issued by Jetstar and we advise you NOT to open any attachment in those emails as they may contain a virus.
If you will be travelling with us shortly and would like to view your itinerary please use the 'Manage Your Booking' page on our website."
Jetstar has reported the email scam to the Australian Competition and Consumer Commission (ACCC) via the Scamwatch website.
According to the airline's spokesman, the scam is similar to a phishing email which targeted Telstra customers on 15 January.
The email, which used Telstra's new logo, said that the recipient's online bill was now available and directed the customer to click on an attachment.
Sign up for CIO Asia eNewsletters.