The articles have already prompted sponsors such as Japanese electronics manufacturer Sony to call for an investigation while sportswear firm Adidas has pointed out the "negative tenor of the public debate around FIFA at the moment is neither good for football nor for FIFA and its partners".
Fifa's top six sponsors contribute around $180m a year to Fifa revenues, according to the Financial Times.
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The Supreme Council for Delivery and Legacy, which is overseeing Qatar's preparations for the event, has repeatedly emphasized Bin Hammam "played no official or unofficial role in Qatar's 2022 bid committee". A spokesperson underscored to CNBC the council had no further statement to make when asked late Sunday.
The latest documents appear to point to Bin Hammam helping push a gas deal with Thailand that could only have worked with the consent of the Qatari government. Other claims involve setting up "discrete meetings" and the use of a £1.7 million ($2.85 million) fund to pay off Asian football officials.
Chief ethics investigator Michael Garcia, formerly a US federal prosecutor, is finalizing a report on the 2018 and 2022 bids on the basis of which further action, if warranted, will be taken.
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