A widespread phishing marketing campaign has been noticed leveraging bogus PDF paperwork hosted on the Webflow content material supply community (CDN) with an goal to steal bank card data and commit monetary fraud.
“The attacker targets victims looking for paperwork on search engines like google and yahoo, leading to entry to malicious PDF that comprises a CAPTCHA picture embedded with a phishing hyperlink, main them to offer delicate data,” Netskope Risk Labs researcher Jan Michael Alcantara said.
The exercise, ongoing because the second half of 2024, entails customers searching for ebook titles, paperwork, and charts on search engines like google and yahoo like Google to redirect customers to PDF information hosted on Webflow CDN.
These PDF information come embedded with a picture that mimics a CAPTCHA problem, inflicting customers who click on on it to be taken to a phishing web page that, this time, hosts an actual Cloudflare Turnstile CAPTCHA.
In doing so, the attackers goal to lend the method a veneer of legitimacy, fooling victims into pondering that they’d interacted with a safety test, whereas additionally evading detection by static scanners.
Customers who full the real CAPTCHA problem are subsequently redirected to a web page that features a “obtain” button to entry the supposed doc. Nonetheless, when the victims try to finish the step, they’re served a pop-up message asking them to enter their private and bank card particulars.
“Upon getting into bank card particulars, the attacker will ship an error message to point that it was not accepted,” Michael Alcantara stated. “If the sufferer submits their bank card particulars two or three extra instances, they are going to be redirected to an HTTP 500 error web page.”
The event comes as SlashNext detailed a brand new phishing equipment named Astaroth (to not be confused with a banking malware of the identical identify) that is marketed on Telegram and cybercrime marketplaces for $2,000 in alternate for six-months of updates and bypass methods.
Like different phishing-as-a-service (PhaaS) choices, it permits cyber crooks the power to reap credentials and two-factor authentication (2FA) codes by way of bogus login pages that mimic fashionable on-line companies.
“Astaroth makes use of an Evilginx-style reverse proxy to intercept and manipulate site visitors between victims and legit authentication companies like Gmail, Yahoo, and Microsoft,” safety researcher Daniel Kelley said. “Appearing as a man-in-the-middle, it captures login credentials, tokens, and session cookies in actual time, successfully bypassing 2FA.”
