Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1db5cce9483f8ff…

MALICIOUS

PDF

47.1 KB Created: 2021-03-19 10:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b760fd764041356e53cbd52d7441750 SHA-1: e04f540c70ee8d9f1e6d8e8ea9d561040d7df0b9 SHA-256: e1db5cce9483f8ffd5624bf97aed3668b53d72df10faf8160b893099d50e89c0
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure due to its small size and image-heavy content with an action trigger. It contains multiple embedded URLs, with dugedepap.ru being a primary indicator of malicious intent, likely serving as a redirector or phishing page. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the overall structure and heuristics point to a malicious intent to trick the user into navigating to a harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7134

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 47 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://dugedepap.ru/wb?keyword=interior%20and%20exterior%20angles%20worksheet%20pdf%20answers
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    • https://uploads.strikinglycdn.com/files/e9959830-5a47-4b13-bf35-ab430ea5cbd3/stihl_ts420_carburetor_fuel_line_diagram.pdf
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_eff6f11029d0495b9e7ae77dd38ded3f.pdf?index=true
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    • https://1e35b969-1f99-48dc-8aa8-d0fb9638bdc8.filesusr.com/ugd/970baa_2f84eae40e5843e583fd6d48e47468b9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3b55678c-6734-46c0-bd6c-8229a5063d5b/msi_z77a-gd65_clear_cmos.pdf

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