Malicious PDF — malware analysis report

Static analysis result for SHA-256 6653f6dd325e4a52…

MALICIOUS

PDF

66.7 KB Created: 2020-11-09 19:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a2ee51d7dae0d959c2ab2ef81f2e5fe1 SHA-1: 1752c9ff2008c728e7efaf05cec2928245c5eadb SHA-256: 6653f6dd325e4a5202b68d66272d56206393aa5f429baa947f30d6a9365540d5
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains an embedded URL and a heuristic firing for an external URI, suggesting it's intended to lead the user to download content. The 'SE_SECURITY_BYPASS' heuristic indicates the document explicitly instructs the user to disable security software, a common tactic in phishing and malware delivery. ClamAV detection further confirms its malicious nature, classifying it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://trafficel.ru/strik?keyword=download+fifa+14+full+version+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413475/normal_5fa6965b269f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418383/normal_5fa64e8214da9.pdfIn PDF document text
    • https://xezuzevujuniz.weebly.com/uploads/1/3/4/5/134586082/dumipiw_gujedexovetox_jubamupem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f899825ec88e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_5f8ee875eaa04.pdfIn PDF document text
    • https://diveziriluro.weebly.com/uploads/1/3/4/4/134447321/3647693.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/5fb74e92-84ca-4b50-8694-08935436adf8/pufuzogotazipedov.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/sumozi.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/39817995268.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/analyse_numrique_2_exercices_corrigs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/915d5d7b-72a5-49d7-9fd1-350f57024728/badodab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc2302c-9a3c-4aab-b081-07b755e50de5/vuribebasapikuselizexi.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/ducks_of_colorado_identification.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_off0000c7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D3 5440 bytes
SHA-256: c8779a93867b11ce63135eda1a95cc03130d18602b924c5726d5cb4d8a33299d
font_01_sfnt_off0000da92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA92 10260 bytes
SHA-256: 4ef875911bfba1be8dc0dbad0415ecd18dbdd63a759518062e42803f5a5df9b1

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