Islamic Interpretation of Dreams (Ibn-i Sirin):

The screeching sound of a pen in a dream represents a writer, or writing on paper, or writing on a chalkboard.

Such screeching in a dream also could represent the chalkboard itself, or teachers of various grades.

As for most people, hearing the screeching of a pen in a dream means divulging secrets, or attacking people’s reputation in the process of attaining one’s selfish goals.