Malicious PDF — malware analysis report

Static analysis result for SHA-256 2729f1edd0f61303…

MALICIOUS

PDF

68.4 KB Created: 2020-12-09 23:00:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: faaef9aa3112f77aada8c78f4e5bd71f SHA-1: 15b55bfcc576f5ffcfd8e9a450d3256892745a8b SHA-256: 2729f1edd0f613031d74c29e78ab24ebfd9328b58fc64357673abda630757f06
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 URI pointing to 'trafftec.ru', which is likely part of the phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, consistent with spearphishing.

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://trafftec.ru/strik?utm_term=wimmer+and+dominick+mass+media+research+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373985/normal_5fa3cd261fe2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_5fb57a7e94608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_5f90dfe5a6642.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387410/normal_5fc75f5f80dbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388422/normal_5fb804c6a2910.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/53464453097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc2b07d-a2fd-4131-896f-1d09c8752367/90029189911.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/network_disaster_recovery_plan_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/540bd35a-ad26-409b-a716-b622644c2e6c/43112618444.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/nylon_structure_chemistry.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc16c3d6b97992eb55fb768/t/5fc3933c3c02f22b9d7b2ac1/1606652733262/anker_vertical_mouse_dpi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF51 5580 bytes
SHA-256: 7c3ce23adf3f065841bec238c3a1d01df3e25cfba2a3e49734faa5e8111f7a77
font_01_sfnt_off0000e22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22B 10204 bytes
SHA-256: f172f90db609b53056163ac4e1dd63cb89071f27a3f067f391df45cf60b152b6

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