Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9270e5f21b78515…

MALICIOUS

PDF

67.4 KB Created: 2020-11-13 14:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8dfda052f7abe456e3ed0246e780f093 SHA-1: b7de0a18ca306054f905727e08e1f3031f275c85 SHA-256: a9270e5f21b78515ab348332c2aa7a58903e9bcfc506a09a52f8e08afc084ba7
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/strik?utm_term=necropsia+y+autopsia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415068/normal_5f9682ea99c63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f9882d54cc60.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/de7c0ab2-329c-42b4-a5db-211c470a7b8e/40243049897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad68e0c-a195-4658-97eb-6adeb92b7a2c/suwibamivumiwud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/742ac271-2751-4062-bf63-d65cca7de19b/nojarapup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3c5210-3d88-4892-ab61-f04008574ed4/jenarepitosesubode.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/sofulesov.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/neoliberalism_and_education_reform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24408e4a-0569-4263-90b5-5479a3d0560a/jowuxufujapebodifal.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/clif_bar_company_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd6c3b3f-c92d-432c-9ef8-7ccdd767f5f2/4524306425.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_off0000ca42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA42 4968 bytes
SHA-256: 6890edb428b4067df7a09dbde63b18c819272fe45611a32717152d0425ef3575
font_01_sfnt_off0000db43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB43 11492 bytes
SHA-256: d13267e3651c498dd00464298c9e4f309c1a42002047da05e86d6e8171cd4705