Malicious PDF — malware analysis report

Static analysis result for SHA-256 61164e6448e02c57…

MALICIOUS

PDF

93.7 KB Created: 2020-12-23 21:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 51149717b2e2534f177cbcdeb064a40c SHA-1: 47455f4ad136b0d222b454f515c9a3a677772bc1 SHA-256: 61164e6448e02c57a5d6f3016e7395c4e79bdb660d425c6750eb59993a0adb41
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://traffmen.ru/123?utm_term=dr+who+amy+pond+died'. The ML classifier also flagged this PDF with a high probability of being malicious. The presence of embedded URLs and the ClamAV detection further support its malicious nature, likely as a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/123?utm_term=dr+who+amy+pond+died In PDF document text
    • https://cdn.sqhk.co/dadakafopina/GjZ0Rij/musically_inclined_in_a_sentence.pdfIn PDF document text
    • https://dibuponabax.weebly.com/uploads/1/3/4/3/134340508/9458375.pdfIn PDF document text
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/57916402d2ac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_5fc33cba24870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f8aca9740009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5f97d77ddaf61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5f8b72a8adc4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444102/normal_5fd3482d63208.pdfIn PDF document text
    • https://vowimodinin.weebly.com/uploads/1/3/4/5/134599446/63a4e6.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/3e020853-f9c8-4e8a-b2f1-19fa237b8971/nebedifuwifavowigofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4363291b-1ca4-4e1a-a697-7af91c73c35d/tivep.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/vibrate_when_call_is_answered_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d315ad-499a-4daf-ae60-bf5095600eae/59778043465.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/20569906170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd852304-393b-475a-b53b-1d2d418a193d/kakidibogavukasuvuxoxof.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_off00013125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13125 5184 bytes
SHA-256: 2fae699e464bf81a4c2d4a6ed0ea81686d8cb6a6888969c6f127349c52bdd3f1
font_01_sfnt_off000142b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142B6 11616 bytes
SHA-256: f0dd84c06a5d2e62420f8d3d9db35ac28f3ad9d2d99175fcd92855a2cb47022a

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