Malicious PDF — malware analysis report

Static analysis result for SHA-256 329500c405536f12…

MALICIOUS

PDF

69.9 KB Created: 2020-11-23 04:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ed13c05734929fe9e2cb2b5ea9cdbf5f SHA-1: b4536fbce4113093614fdce5b89b93021b9602a4 SHA-256: 329500c405536f12a1ac326c020efc8ea7540ddd702fbbfe199780caa2579a6f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'trafffi.ru' was extracted, suggesting the document's purpose is to redirect users to a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URI strongly suggest a phishing or malware delivery 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
  • 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://trafffi.ru/123?utm_term=cool+french+games.net PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f9f42f67eab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f889e1598818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_5fa393179e074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413456/normal_5f96e2d006908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5fb8f1060dc0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369784/normal_5f918c5245cbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449183/normal_5f9e480f25650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f8a718d03cd7.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/zerejibixupav/answers_to_tough_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/76519446890.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/2000-2020__-20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb98e634-9639-4bae-8dbd-10ea70587601/transformational_leadership_style_pr.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/pixufaxadufepamidu.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_off0000d460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD460 5232 bytes
SHA-256: c5c4f056cd49284c39874cf98e970cceda90215226c703688e7a737f795675fb
font_01_sfnt_off0000e606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE606 10708 bytes
SHA-256: 04c1f6a0da0b4a9c542a1bd2b170592143c42a12e56faddc5599630ac77e03ff

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