Malicious PDF — malware analysis report

Static analysis result for SHA-256 65524aeb4b6d6c67…

MALICIOUS

PDF

65.4 KB Created: 2020-11-21 03:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f5d7aaf271b8b93d411ba719aa9dd3e0 SHA-1: 3cdf96679e8486584f3aed8d8a291764a12ec04a SHA-256: 65524aeb4b6d6c67af16d67fde48cb40eeee231186cd58e68fb9debb1c2448c4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'https://trafftec.ru/123?utm_term=tilde+diacritica+ejercicios+en+linea' was extracted, suggesting the document's purpose is to redirect users to this potentially harmful site. No scripts were extracted, but the presence of an embedded URL and the overall malicious verdict strongly suggest a phishing or malware delivery 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://trafftec.ru/123?utm_term=tilde+diacritica+ejercicios+en+linea PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5f913d3d1dc44.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/2311243.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/lolofigage.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/3994192a-d9e7-4ee7-bf97-29b354edf54f/72016285688.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/vadevaxog.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/meditation_for_beginners_kornfield.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/478566c6-65e7-47cf-bc6d-7bfc812a7dcb/84485165332.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/format_three_decimal_places_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b085e36-0af0-4b68-8093-0e15e853425a/kuduledodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c72a488-3a7e-42e6-9430-7336e7011ab3/fundamentals_of_engineering_thermodynamics_solutions_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b580bd1-5a44-49e6-a8e5-bc63e642f87e/kaxogivajelitewaworefefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2373b927-8c3b-42b8-8d7e-0a414654fc57/fujes.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/stick_figure_unblocked_games_crazy_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe595450-c2c8-4e78-b07a-427a10537800/fezezitulotatin.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_off0000c336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC336 4956 bytes
SHA-256: a19125211e590eab299da81e1d7315251defcf990fca80273cdd265a5f74a126
font_01_sfnt_off0000d41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41F 11164 bytes
SHA-256: c9c84b6fc07f0bd1c93cef0048ff44bff9244631b22fde8a2f423e2166c950ae

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