Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2729c52f989a88…

MALICIOUS

PDF

68.3 KB Created: 2020-11-25 07:12:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad31364460969658f6dff6a3dee194ab SHA-1: 7e64a57af37e0aaf1e27353529448deda992691b SHA-256: 8f2729c52f989a8817292e3d28d1dcb98a8193b512c3fe15ebbfc6bb05122010
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to 'traffset.ru', which is likely used for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to formal logic, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/aws?utm_term=que+son+las+ciencias+formales+logicas
    • https://cdn-cms.f-static.net/uploads/4410727/normal_5fbd479eb1b15.pdf
    • https://cdn-cms.f-static.net/uploads/4450259/normal_5fad9e9a6af6e.pdf
    • https://cdn-cms.f-static.net/uploads/4501980/normal_5fabfb7ce21d4.pdf
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f8f00a0b6b86.pdf
    • https://cdn-cms.f-static.net/uploads/4405179/normal_5fa2586d35073.pdf
    • https://cdn-cms.f-static.net/uploads/4402519/normal_5fb2b338a6af0.pdf
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f88897293856.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/426037ce-349a-40da-b3d9-a23bb31e0154/69874049523.pdf
    • https://s3.amazonaws.com/voropa/seduwuxokizan.pdf
    • https://s3.amazonaws.com/sabegokek/jubede.pdf
    • https://uploads.strikinglycdn.com/files/223209e0-e850-493b-87b8-8fd2043de3ae/1502942877.pdf
    • https://uploads.strikinglycdn.com/files/5511d846-d8e3-40b2-8c4c-aa8b87d820de/2014_toyota_camry_service_manual.pdf
    • https://s3.amazonaws.com/fizaxo/biblia_de_jerusalen_1998.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_off0000ca8e.bin
0fa19752ffb8d616d9deac806e03f3175b188c0980094641e98efd946de90d40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8E 5264 bytes
font_01_sfnt_off0000dc64.bin
65ce0ac21750c6de6865280454ac46e619f8c951351f0012d33ad0eff6c6867f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC64 11872 bytes

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