The supplied gas values suggest a rich run condition and possibly a non-functional catalyst.
Using a mixture calculator for the supplied gas values shows that the mixture is 6.4% rich.
CO elevated is the key indicator as it is not present in lean combustion in significant amounts.
NOx is produced in significant amounts in lean combustion and requires high gas temperatures usually on seen under loaded conditions. Little is produced at rich mixtures.
CO2 is maximized at stoiciometric mixture. So low CO2 can mean rich or lean.
FWIW in my vehicle emission testing region (Seattle WA) this engine would pass a tailpipe emission test.
Refer to the graph below for with help with gas value interpretation. The left side of the chart is rich and the right is lean.
Of the list of possible failures the MAF is a possible cause of a rich condition. Fouled plugs would result in much higher HC due to misfire. Low compression would likely be corrected for by a properly functioning fuel control system including an accurate MAF reading. Oil in the combustion chamber does not greatly affect combustion gas values until it gets to excessive amounts. Failures of the PCV system do usually present as lean run problems.