The difference between malingering and hysteria is:
The symptoms is malingering are produced consciously for some conscious motive (e.g monetary gain). In hysteria (dissociative disorders) the symptoms are produces unconsciously and the motive is also unconscious (e.g. attention or love from others).
Hypnosis
Malingering has poor prognosis
Hysteria is more common in females
Conscious motive in malingering
Neurotic, Stress Related and Somatoform Disorders