Malicious PDF — malware analysis report

Static analysis result for SHA-256 0241e09718e3adb3…

MALICIOUS

PDF

67.3 KB Created: 2020-11-17 07:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73430015f4e392cd29d4d8a0b93c68eb SHA-1: a546fa48acf853c2ed76b76b4c66e3ceff8dce9e SHA-256: 0241e09718e3adb3f087899b83b865c3aaf75452529776a873c8318cb47851fd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to a book title.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://trafficel.ru/strik?utm_term=ball+complete+book+of+home+preservin
    • https://cdn-cms.f-static.net/uploads/4386829/normal_5fa9bddc2d7db.pdf
    • https://cdn-cms.f-static.net/uploads/4427785/normal_5f9c633b238df.pdf
    • https://cdn-cms.f-static.net/uploads/4419441/normal_5fafa4c7dd80c.pdf
    • https://cdn-cms.f-static.net/uploads/4419451/normal_5faa7d51ecaf0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cca85039-2663-4524-ac43-038e809052bd/35244446110.pdf
    • https://s3.amazonaws.com/gidibesuxi/claims_of_policy_define.pdf
    • https://uploads.strikinglycdn.com/files/d130f0c6-2b5a-482a-8d52-7128f800cd85/blood_episode_1.pdf
    • https://s3.amazonaws.com/fekaduvopigab/st_michael_chaplet_ewtn_youtube.pdf
    • https://uploads.strikinglycdn.com/files/dbfd8e5a-1af5-486f-96fe-1b90a75d9e79/22542398509.pdf
    • https://s3.amazonaws.com/jidosatikim/91638726422.pdf
    • https://uploads.strikinglycdn.com/files/a872a2ca-c489-4c5e-a564-3d54675d3d9d/epa_section_608_preparatory_manual_9th_edition.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a4.bin
e8507e58fb578d71fdf4de1aa74cd03129ccbd2b27059c0b58d7aa6deb5508da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A4 5568 bytes
font_01_sfnt_off0000dc70.bin
64d829738ce647730d0682f99f15ed42005d89a7f4ee2775b7155f80a2a0169f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC70 10760 bytes

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