No

A cyber attack is a cyber operation, whether offensive or defensive, that is reasonably expected to cause injury or death to persons or damage or destruction to objects.

Michael Schmitt et al; Tallinn Manual 1.0, pp 92
  • Cyber Operation?
  • Expected to cause death or injury to people or objects?
Palestinian Intelligence Services Espionage Campaign on 800 Reports, Activists and Dissidents does not match this definition. Here's a list of actual cyberattacks and and why this matters.

What happened?

Hackers linked to Palestinian intelligence conducted a cyber espionage campaign compromising approximately 800 Palestinian reporters, activists, and dissidents both in Palestine and more broadly across the Middle East.