Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db69eb3d031270d…

MALICIOUS

PDF

40.1 KB Created: 2021-09-24 16:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f9546dc977bee3f26fb023f4771b7f0 SHA-1: 26c91076b853251006fc5d572265fb53c5666186 SHA-256: 6db69eb3d031270dc33ab7d33e66bbb3d081e7b212f17c38d0e3bdd109cae24e
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to trick users into clicking a link. Multiple external URIs were extracted, many hosted on disposable domains, suggesting a link farm or redirection scheme. While no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ourpreferred.com/userfiles/files/sowumutaro.pdf
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/benesu.pdf
    • http://vsrru.ru/userfiles/file/xinijogefibosiwonuvix.pdf
    • http://laihoawedding.com/app/webroot/upload/files/kuwiganomajuworulegu.pdf
    • https://ou-ravda.com/ckfinder/userfiles/files/5461348353.pdf
    • http://www.keizerco.nl/userFiles/file/rojubezixibusik.pdf
    • http://irodaszer.lukinserv.hu/file/16473991013.pdf
    • https://ultralloy.net/upload/files/36390377980.pdf
    • http://architettogherardi.eu/userfiles/files/86849042235.pdf
    • http://ansonseatery.com/uploads/files/libabakiniremilisisowewuv.pdf
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/nikobupalomuragoko.pdf
    • https://dalycity.com/wysiwygfiles/file/rominaxilerew.pdf
    • http://imosa.asia/uploads/files/202109180506407406.pdf
    • http://serbanindustrialconstruct.ro/uploads/files/solexekom.pdf
    • http://svaz-podnikani.cz/files/file/pisuvuripugob.pdf
    • http://tanriovermensucat.com/uploads/genel/files/95615346645.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=jailbroken+firestick+live+tv+apps

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