Malicious PDF — malware analysis report

Static analysis result for SHA-256 68200077be0fa12b…

MALICIOUS

PDF

51.6 KB Created: 2021-03-19 20:05:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea17e08243850b72efed5816c2627cc7 SHA-1: d2d1fe0e51573af45b343d5e569bba6c52d2144b SHA-256: 68200077be0fa12b07528955bb2565c16916e9ba94838ee0132e990e7a2748bb
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier. It functions as an image-only lure, typical of phishing attacks, where a screenshot hides a clickable link. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The primary suspicious URL identified is https://jottigo.ru/aws?utm_term=calculator+julian+date.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7339

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 51 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://jottigo.ru/aws?utm_term=calculator+julian+date
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    • https://9e1e9198-0fe7-4103-8084-fdcc6befb8d5.filesusr.com/ugd/2f7815_8e6edeb8f28e4b548d37bbbeb1cb2b4a.pdf?index=true
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