Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d9087cc1ba7186…

MALICIOUS

PDF

65.7 KB Created: 2020-11-30 12:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a5caabf0e5b75d83d183836ead4f8588 SHA-1: 83d0a372b01c117b3f163f81bd766e85edc528b9 SHA-256: 38d9087cc1ba7186c2d0de1653cae3a1ebbe6504eefdc71cb314eb2b4d467cc7
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to 'trafffi.ru', which is flagged as suspicious and associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/aws?utm_term=mercedes+benz+france+certificat+de+conformit%25C3%25A9 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453108/normal_5fbefc9281429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504788/normal_5fb7da70547c4.pdfIn PDF document text
    • https://wigotimobegevuj.weebly.com/uploads/1/3/4/3/134312632/2867f296.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/6347600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415051/normal_5fb8c0b3ce988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385204/normal_5f8e83049ee9c.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/vigevot/36283115665.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/manual_for_insta_pot_duo_nova.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffa571c8c7413142c9acf/t/5fc151677acac6192af1c8b7/1606504807966/ziwajinenira.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d019b1ed03538d15b64/1606372615068/kolepabenojopodomodupod.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/rexulunaseverunanulol.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/alberta_works_reporting_login.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/42818861432.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_off0000c23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC23C 5472 bytes
SHA-256: c729970c6b7f096c281a6f027474d361d77fc504e4c39b97852d94d473b3dd10
font_01_sfnt_off0000d491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD491 10592 bytes
SHA-256: cbc064e24dd9e341fc0179153267a61b8fb0bc378f4d67878ffc8eae410b897b

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