Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0c9feecb462261…

MALICIOUS

PDF

37.6 KB Created: 2021-09-04 04:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb9a1438895213ab4cf7720eb4b9b8ab SHA-1: 11e1cb8749caac3e1f8978087b1755b0b0536d1b SHA-256: 6b0c9feecb4622613b0e2f7d27d301b0565217106b570bd3272c16a66a9e129e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, employing an image-based interface to deceive users into clicking external links. The embedded JavaScript stream and the presence of multiple URLs pointing to compromised WordPress sites suggest an attempt to download and execute a secondary payload. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9611

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 37 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/2fa1eb4ba9100ee0960add6972dc97de/rabilewilaned.pdf
    • http://hurtmar.pl/Upload/file/zazifusunabipe.pdf
    • http://agro-vostok.ru/userfiles/file/42611545542.pdf
    • http://maezawa-jidousha.com/js/upload/files/84979928100.pdf
    • http://gold-carsales.com/js/upload/files/vodigezaxe.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160edf4d1430b8---pitidif.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cce68545b4a---48106323666.pdf
    • http://nappsa.org/userfiles/file/26898084246.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/e97e11be52153d01927d050742ec4c09/45583307984.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=manual+usuario+kia+rio+2016

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