Qatar condemned on Friday what it called unfounded allegations by "bad actors" after The Guardian reported the country had attempted to discredit a woman who accused the ICC's chief prosecutor of sexual misconduct.
Karim Khan is currently on leave pending an investigation into the allegations.
The British lawyer gained prominence after he successfully requested an International Criminal Court arrest warrant against Israeli Prime Minister Benjamin Netanyahu for alleged war crimes in Gaza.
In an article published on Thursday, The Guardian alleged that his accuser was targeted by private intelligence agencies at the request of Qatar.
The objective of the secret operation was to collect information which could discredit her, in particular by uncovering links to Israel, the paper reported.
The Qatar media office on Friday denounced the report as "unfounded allegations".
"These claims are part of a coordinated campaign led by certain bad actors" it said in a statement, adding it was being targeted for its mediation role in the Gaza war.
It said the reports were based on "falsified information".
The ICC's oversight body announced last year that it had requested an external investigation into allegations of "alleged misconduct" by Khan, without providing further details.
According to various media reports, Khan was accused of inappropriate sexual behaviour towards a member of his office. He has denied the allegations.
Last year, Khan asked the ICC to issue arrest warrants for Netanyahu, his former defence minister Yoav Gallant, and three senior Hamas officials.
All three of the Hamas leaders were later killed. The warrants against Netanyahu and Gallant were granted and remain outstanding.
