Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f7f5c103f2bb03…

MALICIOUS

PDF

81.6 KB Created: 2020-11-16 23:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 81f3ab2beb85c0332ceda75e07573529 SHA-1: 1d376632e024bd37071877fbfe511289a3afd281 SHA-256: 90f7f5c103f2bb03ffc3a7f8c588b298ef8f1be86b5ec46ea561a8614ea1a2a7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. ML classification and ClamAV also flagged this file as malicious. The embedded URL is likely intended to lead the user to a phishing page or a download site for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?utm_term=william+givens+jensen+tennis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f960dafa7d6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f9787551080d.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/610f6778e0fa345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_5f8aa0261530c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/95612b92-0993-4819-8008-0a03fe0e9037/xipok.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/jezas.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/91453341972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9af637d1-cf43-48ef-90ee-da3ce56d76f5/chevrolet_logo_vector_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A9 4736 bytes
SHA-256: c4e12c73b77a52c4cc74fcf0a216d3e421bb0aa4527d7220baae8854abeb808b
font_01_sfnt_off000105b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 11428 bytes
SHA-256: 949e9efd0a5bd272245162a0ce15313d4d7f8d962c1aa7094a2343ee68b2216f
font_02_sfnt_off00012c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378