Click injection is a mobile ad-fraud technique where a malicious app installed on a device detects that another app is being downloaded and fires a fraudulent click immediately before the install completes, so the fraudster's click is recorded as the last touch and gets credit for the conversion under a last-click attribution model — even though it played no real role in acquiring the user.
Definition
Click injection is a mobile ad-fraud technique where a malicious app installed on a device detects that another app is being downloaded and fires a fraudulent click immediately before the install completes, so the fraudster's click is recorded as the last touch and gets credit for the conversion under a last-click attribution model — even though it played no real role in acquiring the user.
It exploits the timing gap between an app download starting and the attribution click being recorded, and is distinct from click spamming (firing many clicks hoping one matches a real install) by being precisely timed to a real, imminent install event, which makes it harder for basic fraud filters to catch.
In context
For affiliates and networks running app-install or CPI (cost-per-install) campaigns for iGaming apps, click injection is a direct financial threat because it steals attribution and commission from the traffic source that genuinely earned the install, while the advertiser pays for a conversion the injecting party did nothing to cause. Explaining the mechanic helps a legitimate affiliate understand why an advertiser's fraud team scrutinises last-click timing (a click recorded seconds before install completion, from an app with broad device permissions, is a red flag) and why some networks have moved toward view-through and multi-touch attribution specifically to reduce injection's payoff.
Content should frame click injection as theft from honest affiliates as much as from advertisers — a legitimate publisher's traffic gets its commission stolen by the injector — which is a useful angle for explaining to affiliate partners why an advertiser's stricter attribution rules or holdback periods exist. It should not describe how to build or deploy an injection SDK.
A comparison of mobile measurement partners (MMPs) on their click-injection detection methodology (click-to-install time analysis, device permission auditing) is legitimate, useful affiliate-facing content.
Worked example
An MMP's fraud report flags 200 conversions with a click-to-install time under 3 seconds, all attributed to one sub-publisher with a device-permissions profile typical of injection SDKs, and the network excludes that sub-publisher's traffic from the payout run pending investigation.
Related terms
Frequently asked questions
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