Malicious PDF — malware analysis report

Static analysis result for SHA-256 181a4cfe01d225a8…

MALICIOUS

PDF

37.2 KB Created: 2021-09-16 23:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fc8c0e7b13e3f50560ec696887cbdb78 SHA-1: 44928919a4f38b224a667f026c0155a078e02b11 SHA-256: 181a4cfe01d225a8f3352d53d3c97a75606620163909f739a387d605fa5a3501
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only document designed as a phishing lure, typical of a screenshot attack. It contains multiple embedded URLs pointing to potentially malicious PDF files, suggesting a download or redirection mechanism. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6667

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 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.
  • 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://gusanhightec.com/userData/board/file/ferinizovakonikokubaxo.pdf In PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/34889944202.pdfIn PDF document text
    • http://zgic.ru/!upload/files/ziwofufipipowed.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/vojibawunuzo.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/42049503362.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/koguledajedi.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109090248589337.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/20886398117.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=torrent+tpb+proxyPDF link annotation

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