Malicious PDF — malware analysis report

Static analysis result for SHA-256 231d9394805312bd…

MALICIOUS

PDF

82.9 KB Created: 2020-12-30 19:50:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 268b93c2d9c39332d6502e1bcf66dac9 SHA-1: d23e127b7674017621f8f696b767f668bcfe0bf6 SHA-256: 231d9394805312bdeed4c28e3b9054e28f9adec11ebf92dc1b5e0c4a0c007b54
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'trafffi.ru', which is likely a malicious domain used for phishing or distributing further malware. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI strongly suggests a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=reforming+old+capacitors PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410730/normal_5f9543755c8dc.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/hdEjfAn/pisagitiweniluxejigej.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/PjeCrGu/66994317800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377115/normal_5f8cb70becf7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f8b38c69e8fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485166/normal_5fe0cc9f6cd22.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/heywijg/bawat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5fae0e3b61ab8.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/kitakilesa/manual_j_8th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ef5620-0f57-4802-8d56-82b499821ac9/wujumiler.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/71734175989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7d1f51f-acda-479a-8904-1d9aa46ec19f/jenny_lind_crib_hardware_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/95512789606.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/damage_report_car.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/kujubipaveju.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/gapasugiwirojanepi.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_off000106da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DA 5484 bytes
SHA-256: 8c9f0927a3c28d364bbb09b347d6d9a8715be5293197a870eaf04fa27d318411
font_01_sfnt_off0001196e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196E 10936 bytes
SHA-256: efcfc47140fd8dba7d13aba94c70ab0ba134ca1453da9d66974bdde75a90c586

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