A widespread phishing marketing campaign has been noticed leveraging bogus PDF paperwork hosted on the Webflow content material supply community (CDN) with an purpose to steal bank card data and commit monetary fraud.
“The attacker targets victims trying to find paperwork on search engines like google, leading to entry to malicious PDF that incorporates a CAPTCHA picture embedded with a phishing hyperlink, main them to supply delicate data,” Netskope Menace Labs researcher Jan Michael Alcantara mentioned.
The exercise, ongoing because the second half of 2024, entails customers searching for e book titles, paperwork, and charts on search engines like google 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 purpose to lend the method a veneer of legitimacy, fooling victims into considering that they’d interacted with a safety examine, 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 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 occasions, they are going to be redirected to an HTTP 500 error web page.”
The event comes as SlashNext detailed a brand new phishing package 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 strategies.
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 fashionable on-line companies.
“Astaroth makes use of an Evilginx-style reverse proxy to intercept and manipulate visitors between victims and legit authentication companies like Gmail, Yahoo, and Microsoft,” safety researcher Daniel Kelley mentioned. “Performing as a man-in-the-middle, it captures login credentials, tokens, and session cookies in actual time, successfully bypassing 2FA.”