Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e6e21b3da9a6c6…

MALICIOUS

PDF

68.4 KB Created: 2020-12-07 08:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1811e145475c2223a82270efef8bb363 SHA-1: 5ff3ed47367e2ce851145746e50ec2dc18a2a2d2 SHA-256: e4e6e21b3da9a6c67a9cb41f7dba6b393d187d6dc971d3a5a381f644b44e3655
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 the URL https://traffmen.ru/strik. This, combined with a high ML classifier score and ClamAV detection, strongly indicates a malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a Verizon router review, likely to trick users into clicking the malicious link.

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
  • 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://traffmen.ru/strik?utm_term=verizon+fios+router+actiontec+mi424wr+rev+i+review In PDF document text
    • https://kudigebudubug.weebly.com/uploads/1/3/4/3/134353201/betusogabor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5f9e91253bc23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5f8fb7272626e.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/8f142602-3faa-4766-9491-9f306c3f70aa/85092840183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/818c85af-caad-4d40-94ed-bde3834844fa/relorakonubuvafodazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2a3858-1258-4204-9a8e-2034bfd785d7/anima_quest_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1619768612547ed61873d/t/5fcb12e9b6b7366152f29341/1607144169449/star_wars_hidden_empire_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa36b41-d1bf-45b8-971e-c7b17fa582e7/21727361712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f5fc2c1-2df0-477e-9e55-7f7af3a794ea/zobomubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/982121df-2551-4dfe-a8fe-492251727fe1/1760807198.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b829cd1e280355f52c70/t/5fcd6eb8fe657040d5a64724/1607298745311/59204263958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/922e8e82-4451-4238-9227-ad0c5d9ccc7e/venudenasobo.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_off0000cce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE6 5380 bytes
SHA-256: 56d16c3da896a7cd7fdf198fe8326f95db7f993a694e0ad678ba91cc6cc8ecbc
font_01_sfnt_off0000df4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4B 10840 bytes
SHA-256: 3985ea56e4fec31d3f4b47dd3a76a211430defcd56443d6582012358802c8f9d

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