Malicious PDF — malware analysis report

Static analysis result for SHA-256 95304e7a17e9bf6b…

MALICIOUS

PDF

37.3 KB Created: 2021-10-11 23:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 08da4284d642da932a54ed2fab88f549 SHA-1: 4369bfe2f72d19532edbf4ca638f9b37d03dfc24 SHA-256: 95304e7a17e9bf6b34509a21238cede0668303a629b6f2a37cdeef8a3f637bcb
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an image-based interface and numerous links pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content. The heuristic PDF_IMAGE_LURE specifically indicates a common tactic where a screenshot is used to hide clickable elements.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6667

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.
  • 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 https://cplastik.eu/data/cms/file/32455104618.pdf In PDF document text
    • https://virtrade.gr/userfiles_lybo/file/rixes.pdfIn PDF document text
    • http://gz-chengeng.com/uploadfile/files/wenafoxibo.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/a6016827226519f665c96ced754de39e/puxiwipazunet.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109242355254602.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1616044b8673a9---wufadunikeliwofuxos.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/bj08a06fovlvungl19m755kr94/babogedejunopazes.pdfIn PDF document text
    • https://kar360.com/resimler/files/juxesosibunuzupeva.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/EqozwcbAC44/uplcv?utm_term=what+is+tempera+paint+used+forPDF link annotation

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