Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9dc3020a20700a3…

MALICIOUS

PDF

67.1 KB Created: 2020-12-16 21:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d2cae6e1bc3fd8d21aee23dd9f6b96e8 SHA-1: b7af85c756537f3dfd53acedd325b43edd126f8b SHA-256: a9dc3020a20700a34570e2a9c7ee0c644305c48be77f6a9c5e0c71fceb5088b7
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

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/strik?utm_term=reciprocal+reflexive+verbs+spanish PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f942350abdf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f968ec5c15e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453747/normal_5fcba03fba903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_5fbda3723fa90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5f9aa704df741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454670/normal_5fc28098c621d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2f0867-6962-4368-8604-074dd507ccf8/chaine_de_cote_cours.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc389b02cf09257bd7c80b9/t/5fcc1f7b33187724c4e12a24/1607212926882/18747938028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e73254b-0db9-49af-bfca-b2578d6c7655/2020_infinti_gnw600i.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce9b3ed3eaab09dc44e30b/t/5fd69ecd313c42342b9712d8/1607900880569/new_stemi_guidelines_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b14fb0cf-fbd0-4eb6-8b57-e3fca137fca6/el_suicidio_durkheim_mercadolibre.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0e31f81c9a2a0c69bb80/1606290993467/susumimusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d1eb99-fd47-4dd2-9e38-03e6fe487fa2/96097451005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66bc88d3-0dc3-45df-93ef-eceff36da22f/vidmate_install_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d14deb8-fc32-4e0a-a0fa-aae43ff5a22e/pimolajovupar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19f6380-1f62-4e7d-8865-85cffe96751d/inside_the_actors_studio_interview_questions.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC958 5376 bytes
SHA-256: 6a7281196ac18b7a1a3711d7a459cbc0364b0aa72d5da706882c75d7e1182f9a
font_01_sfnt_off0000dbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAA 10800 bytes
SHA-256: f233f3b1a7216083b83bbf6853d4ae89d11fd15ee066e644a808b87e0dbd0d91

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