The first comment from Salim al-Jubouri on "to be one of his advisers leading the intelligence of Iran"
"I am not aware of this information," Jubouri told state television.
"As an official it is natural to have relations with everyone, but the documents published may carry a street turn," he said.
"Question marks on the timing of publication of leaked Iranian documents."
Secret documents published in The New York Times revealed that Salim al-Jubouri, the most senior adviser to Iraq's former speaker of parliament, was an Iranian.
The documents, estimated in the hundreds and monitored the situation in Iraq between 2014 and 2015, reported that Tehran relied on ministers in successive Iraqi governments, noting that former Iraqi Prime Minister, Nuri al-Maliki, and former Interior Minister, Bayan Jabr, among the most prominent close to Iran, An intelligence leader volunteered to work with the Iranian regime.
The documents also revealed the readiness of Haider al-Abadi to cooperate with Iran's intelligence despite Tehran's suspicions, and that an Iraqi intelligence leader informed Iran of his willingness to deal with him, pointing out that Iran has always relied on ministers in successive Iraqi governments.
She said Iraqi political, security and military officials had established secret relations with Iran, noting that Iran had focused on appointing high-level officials in Iraq.
The newspaper said that the leaked Iranian reports confirm the visit of the Quds Force commander, Qasem Soleimani, to Iraq to support Iraqi Prime Minister Adel Abdul Mahdi, stressing that Soleimani sets Iran's policies in Lebanon, Syria and Iraq.
While Iran has heavily deployed agents in southern Iraq, Iranian intelligence has recruited a US State Department official for Washington's plans in Iraq.
The documents also confirmed that Tehran used Iraqi airspace to pass military assistance to the Syrian regime.
The then Iraqi Transport Minister rejected Obama's request to stop Iran's exploitation of Iraqi airspace.