Ousaban Banking Trojan Targets Iberian Bank Users with Fake PDF Lures

A Brazilian banking trojan called Ousaban is going after Windows users who bank in Spain and Portugal. Fortinet’s FortiGuard Labs identified the campaign in May 2026.

It opens with a phishing PDF disguised as a corrupted file, checks that the visitor is really in Spain or Portugal, and hides its real payload inside an image.

The goal is the usual one: steal banking logins and take

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