Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d37fe227782879b…

MALICIOUS

PDF

66.3 KB Created: 2021-02-24 05:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0ace7200b68e4c7690cf2ec6c9ea5cf3 SHA-1: a3075732c89feefdf8d8cd2839ed5b50595927e3 SHA-256: 5d37fe227782879bd89b1c7e582e7b9352e4e80ddf6a39540e679b761203b19a
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a malicious domain, likely intended to trick the user into downloading further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a common phishing lure.

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://seumenha.ru/strik?utm_term=sharp+ac+remote+control+instructions PDF link annotation
    • http://drnextact.xyz/download_tiny_planets_episodesgu7qg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366665/normal_6001a73d89cea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5fe991fcc90bb.pdfIn PDF document text
    • http://naturagrush.space/microsoft_band_2_meditation_app0ucxl.pdfIn PDF document text
    • http://rujokevawevi.22web.org/fluoro_guided_si_joint_injection.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470014/normal_5ffbffc3300e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_5fea14fdc54d8.pdfIn PDF document text
    • http://tumbaa.space/laxelefizejalo5r5u0.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/tutapaxi/54434027441.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/fagor.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/factorising_brackets_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/commando_game_for_windows_10.pdfIn PDF document text
    • http://mofomunor.rf.gd/dunizafajos.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/interface_design_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/ditiwugufarefunixokolum.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/meal_prep_guide_for_bulking.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/financial_forecast_budget_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/difficult_questions_to_answer_during_an_interview.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_off0000c870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC870 5276 bytes
SHA-256: 1271272dbce02147775a8872f3b823d34c861661bc2d13f631247861d88daa7e
font_01_sfnt_off0000da35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA35 9976 bytes
SHA-256: d9e87854b8eb9f2996360c530235253cfa65efa0dd750340a94cb5180891ff2e

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