If you are referring to a specific story you heard, it might be one of the following:
It might be a specific "cursed image" story from a Polish forum (like Wykop or local horror groups) where a user claims to have found a disturbing detail in a photo of a car. SamochГіd2.jpg
A very famous video from that era features a peaceful car driving through a green valley before a zombie jumps out at the screen. While usually a video, stills from it were frequently shared as .jpg files. If you are referring to a specific story
If you provide more context, I can help track down the specific tale! If you provide more context, I can help
In the early 2000s, files with generic names like "samochod.jpg" or "car.gif" were often used to hide "screamers"—images or flash animations that would suddenly play a loud noise and show a scary face to prank users.