Fat Orange Rapist Felon Grampy Jesus is REALLY ANGRY that you don't want him to have a nice new $400M plane.

[Bernardo de La Paz]

7. I think you mean white elephant (ruinous gift). Trojan horse would refer to any espionage bugs. So could be both

If the Thai king wanted to ruin some domestic adversary, he would give them a white elephant. Because it was from the king the person could not give it away because that would disrespect the king and the person would be shunned by everyone and go down. So the person had to pay for upkeep and feeding and maintenance that they could not afford and would go down that way. Plus people would consider the recipient to be rich and expect them to be generous in turn, spending money in the community, which they would soon not be able to afford.

Here's a better explanation:

The term derives from the sacred white elephants kept by Southeast Asian monarchs in Burma, Thailand (Siam), Laos and Cambodia.[2] To possess a white elephant was regarded—and is still regarded in Thailand and Burma—as a sign that the monarch reigned with justice and power, and that the kingdom was blessed with peace and prosperity. The opulence expected of anyone who owned a beast of such stature was great. Monarchs often exemplified their possession of white elephants in their formal titles (e.g., Hsinbyushin, lit. 'Lord of the White Elephant' and the third monarch of the Konbaung dynasty).[3] Because the animals were considered sacred and laws protected them from labor, receiving a gift of a white elephant from a monarch was simultaneously a blessing and a curse. It was a blessing because the animal was sacred and a sign of the monarch's favour, and a curse because the recipient now had an animal that was expensive to maintain, could not be given away, and could not be put to much practical use.

The Trojan Horse had a military weapon inside (a cadre of special forces military). There would likely be bugs in the plane that Russia (for example) could exploit on the ground by tapping into whatever stream the Qataris obtained from the plane.

So perhaps it is both.