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 info and commit monetary fraud.
“The attacker targets victims looking for paperwork on serps, leading to entry to malicious PDF that incorporates a CAPTCHA picture embedded with a phishing hyperlink, main them to offer delicate info,” Netskope Risk Labs researcher Jan Michael Alcantara mentioned.
The exercise, ongoing because the second half of 2024, entails customers in search of e-book titles, paperwork, and charts on serps like Google to redirect customers to PDF recordsdata hosted on Webflow CDN.
These PDF recordsdata 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 considering that that they had interacted with a safety verify, 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. Nevertheless, 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 coming into bank card particulars, the attacker will ship an error message to point that it was not accepted,” Michael Alcantara mentioned. “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 title) that is marketed on Telegram and cybercrime marketplaces for $2,000 in alternate for six-months of updates and bypass methods.
Like phishing-as-a-service (PhaaS) choices, it permits cyber crooks the power to reap credentials and two-factor authentication (2FA) codes through bogus login pages that mimic widespread on-line providers.
“Astaroth makes use of an Evilginx-style reverse proxy to intercept and manipulate visitors between victims and bonafide authentication providers like Gmail, Yahoo, and Microsoft,” safety researcher Daniel Kelley mentioned. “Appearing as a man-in-the-middle, it captures login credentials, tokens, and session cookies in actual time, successfully bypassing 2FA.”