I can't say whether this lottery or at least this particular draw is rigged or not although there have already been many talks about it. But I guess the pattern of the winning numbers is simply a coincidence. If this is indeed rigged, those who chose the winning combination should have picked random numbers. Picking a winning combination such as this would only ignite suspicion. If players doubt, they might not play anymore. That means a loss in revenue.
Of course it's statistically possible. It has the same probability as any other 6 numbers.
Even if you see the result "1, 2, 3, 4, 5, 6", that would still be fine. It has the same chances as any other random result.
With the number of lotteries in the world and nowadays with online lotteries, it is normal that from time to time some striking results appear, and those who wonder if the game is rigged because they see results like that, I think they don't know much about mathematics.
In fact, people who know a lot about mathematics don't tend to play the lottery very much, if at all.