Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6937ec17d47759…

MALICIOUS

PDF

63.6 KB Created: 2020-11-24 02:49:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bade1d919b41286ecb5cf7d8996341d SHA-1: 1b1f9393d88afebeac68319c4e5ad21854b8db73 SHA-256: fe6937ec17d477590f3027ee91c31fb3c70d233e84fab797b52aed5a36a699f2
96 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, traffset.ru, which is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of the external URI suggests a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?utm_term=nyse+arca+biotechnology+index+fact+sheet
    • https://cdn-cms.f-static.net/uploads/4411691/normal_5fa3e05f756ae.pdf
    • https://cdn-cms.f-static.net/uploads/4374203/normal_5f8c69c44a880.pdf
    • https://cdn-cms.f-static.net/uploads/4500889/normal_5fb5a6707c3b6.pdf
    • https://cdn-cms.f-static.net/uploads/4484641/normal_5fb702bf113d7.pdf
    • https://cdn-cms.f-static.net/uploads/4478933/normal_5faf47c239b9a.pdf
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f87514338284.pdf
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5f9b8c5690453.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dad76fd8-4f41-480d-b538-fa243895cc18/judukobubosewuwoganijunin.pdf
    • https://uploads.strikinglycdn.com/files/a1f5b0c2-1af7-42f7-af1f-9dea13c927b9/11647998898.pdf
    • https://s3.amazonaws.com/feliso/29918898716.pdf
    • https://uploads.strikinglycdn.com/files/eb30b06a-693d-4fdd-810a-8e24081e4c71/a_guide_to_the_starwars_universe_second_edition.pdf
    • https://s3.amazonaws.com/zetituri/vekafoso.pdf
    • https://uploads.strikinglycdn.com/files/283f859b-76df-43ab-943a-506eec6fa6cb/korudezozadu.pdf
    • https://uploads.strikinglycdn.com/files/8ad986b6-52e7-44c4-ba89-2bb839f41379/fegafutiviwakusa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bab0.bin
3375a401296333511aff335e6c555f51e3e5bc1affc76ef231c2a38d2ba69dca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB0 5564 bytes
font_01_sfnt_off0000cdaa.bin
68b2e600d888ec51afb756b51c4c897e44aa2ab18127ef57a8b9d7c0d3fba9fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAA 10536 bytes

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