Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebfed6fadf6bc599…

MALICIOUS

PDF

83.4 KB Created: 2021-03-26 07:09:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6143a414ce2f32747b2a1c0672ce53fe SHA-1: b1b4d1717ada4eb89735913b8537fcaab549b181 SHA-256: ebfed6fadf6bc5996d45adac7c8a786f8872dced1460d662aa3379c59d2ac574
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. The embedded URL points to a domain associated with phishing, likely intended to trick the user into believing they have won an award. No scripts were extracted, but the PDF structure itself contains the malicious URL.

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://jacksth.ru/award?keyword=bu+kek+siansu+kho+ping+hoo+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447084/normal_604adddc51985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470222/normal_6024701ceef3b.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/gimipezoloxekizuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494893/normal_601f64f0e69f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_6049545655d41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446789/normal_5fe4e06af09a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duwemanuwixam.atwebpages.com/vopibusatexoduvaluwigiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec9819b-9218-452d-8dd6-15366662856b/8230029433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f26cef-a64b-4014-a412-2b5760c36eef/physics_ncert_solutions_class_12_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15864c2e-40d7-47dd-86ed-be98f70e318d/they_say_i_say_4th_edition_chapter_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50bfa09a-210e-4859-ac31-ea366ddfd75a/civil_rights_timeline_lesson_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7af0a82-7545-4458-8a4d-10a274298dd2/simplified_numerical_analysis_1_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/gastonia_police_department_accident_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/226a89be-3a47-47fa-b056-193f3e434751/what_size_is_30_in_jeans_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/648070627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/788a4361-df7f-444d-9e13-d513aa839d93/sifemupajofi.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/61104448314.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C5 10904 bytes
SHA-256: 1ea680bd3370f66318512a458cdd04bedb73538c06781df7289fc57ebbce5a54
font_01_sfnt_off00010a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8F 5288 bytes
SHA-256: 9f85ace77e42219cca1ac9b6d03d9331d5b6d682063b4071b5d38d7f665aa699
font_02_sfnt_off00011c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9A 10472 bytes
SHA-256: 326c9a264421eb599570bb4ee2795bd61e7159577c051da0940ee69c4ff9e769

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