Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9c3ac29b84139a9…

MALICIOUS

PDF

72.7 KB Created: 2021-02-25 20:58:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 23f4d596df8853af17096612f3a84f21 SHA-1: 57d624681ddfddc8e385878195465d825623a826 SHA-256: a9c3ac29b84139a91666df4c081776ab60c2b4f5891b049da76f1f536fa8c55a
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an embedded URI pointing to a suspicious domain, and ClamAV detected it as a phishing trojan. The document body, though heavily obfuscated, appears to contain keywords related to Tesla models, suggesting a lure to a malicious URL. No scripts were extracted, but the presence of an external URI and the ML classification strongly indicate a phishing attempt.

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://jottigo.ru/strik?utm_term=tesla+model+3+vs+y+side+by+side PDF link annotation
    • http://zanovekolasin.mywebcommunity.org/buzadizo.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/fomolo.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/2468854481.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/33351872578.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/can_i_learn_muay_thai_at_home.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_601868189ce03.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/how_to_heal_your_emotional_pain.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_6017cd78297c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481540/normal_5feb5bb777b2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_5fdc5174cd152.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/zalisujezajaje/how_to_determine_angle_measures.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/30681231679.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/fes_morocco_travel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/kalipufajelelafakuse.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/anganwadi_karyakarta_bharti_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/28930021061.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/lion_king_color_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/mevogolavujujota.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/40260529865.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_off0000e152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE152 5288 bytes
SHA-256: 06cf93450360147d42ec2c23f3a5e1b707a19db06d3ba3f15fcff37e6cea0f03
font_01_sfnt_off0000f347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF347 10040 bytes
SHA-256: 76a753aa07866727e763a4aecee0d40124819e6c33820d96b11358f735e6891a

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