Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9522af0b5742ea0…

MALICIOUS

PDF

37.2 KB Created: 2021-09-16 16:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0054b21721fb6eabb6b4ab7c11370a53 SHA-1: f8984afe192518939380ca3e6439566bbeff3663 SHA-256: e9522af0b5742ea0bd242ddaccc93d539654a1a32dcce99f46d19ea9e9353485
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-heavy content, typical of a screenshot designed to hide clickable links. Multiple external URLs were extracted, suggesting a redirection chain to a malicious site. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6864

Heuristics 5

  • 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.
  • 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://pharmnet.cz/ckfiles/files/files/4360886520.pdf In PDF document text
    • http://mrs-edu.com/sribati/editor/uploadfiles/23909293860.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd432dd06e---pupotogidir.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/fe2c773c5b93863e6aee20b9bb823afb/kurerel.pdfIn PDF document text
    • http://digifast.cz/userfiles/43873786036.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/rafewigonol.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/jabif.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/wawonarobalivirim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=watch+walking+dead+season+10+putlockerPDF link annotation

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