Malicious PDF — malware analysis report

Static analysis result for SHA-256 6860912ab22929bb…

MALICIOUS

PDF

67.1 KB Created: 2020-11-24 21:58:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 966f5bc59bbe20630063d162c57fa1f1 SHA-1: 78d4d2f472f4cf9ac622dddec3ea717140d6b0d4 SHA-256: 6860912ab22929bb9ce90cd592b013deabb0580f915b79889f1d9f358d310ab5
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that this document is designed to direct users to potentially harmful websites. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing and redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/aws?utm_term=best+all+wheel+drive+manual+sports+cars In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405925/normal_5fa173ca80d38.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/1d44b872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_5f9a82cf19252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410983/normal_5fa80cc28f6b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_5fa5d2c095bcb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/44255712022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf8c5fd4-bab8-41c9-beb6-850a0b9d1db0/fasobemolidapizati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32269358-be2e-4f57-830d-3e080b7541fd/nigurezuxav.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/762614605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97818c43-b278-4f4d-a01c-3258d447838b/luzuzikopusuzejikad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3663f4af-924c-4bfe-8d43-0db0d96dccaa/8466474651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d32199d2-2c62-480e-80fb-eca1fcf3a78d/76386569219.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_off0000cacc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACC 5512 bytes
SHA-256: df5f797bc223a94ad74d31242465314df2e5e5d784c9e1a49a6bde85e2596082
font_01_sfnt_off0000dd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD74 10136 bytes
SHA-256: e7cc1406e132954ef915be6b02281877d29b8e5ea1cb5ac7e3bf15d949e320fd

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