Malicious PDF — malware analysis report

Static analysis result for SHA-256 47652ae099ccae5e…

MALICIOUS

PDF

76.9 KB Created: 2020-11-13 18:49:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 612384772ec9fcb084551f28f20275d0 SHA-1: d8bbc205ba4bb2f7d9afd3edb366a1a249928aff SHA-256: 47652ae099ccae5eb216714d1b61d1117f6d1f2e50109b0033c0189b07f79ac2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is designed to redirect users to malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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/strik?utm_term=dossier+animation+promotion+bac+pro+commerce+exemple PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419437/normal_5fa3626f6a600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f873bbaf1296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f8b430064096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426957/normal_5fa586a2e90c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f952e41cd486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5f8a1fef17e6b.pdfIn PDF document text
    • https://kobuxomibusopi.weebly.com/uploads/1/3/4/6/134609859/pufijed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470207/normal_5fa938ff329f5.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/10a4d609-483c-43e9-8b80-c1544b5a8114/zukumulep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0cda487-7b1a-4717-b110-aa2cb301ee4d/birakusuravukezaxaxuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3868b485-3d52-4fa1-9426-8e5b3bd43b89/1331659474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03399da-5950-48e8-93cb-33e78f0f6a9a/how_much_is_32_oz_in_liters.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_off0000ef3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3A 5284 bytes
SHA-256: 438cf5f6e992d82bf6b39d3fd8162751ff011c7a42585d15970411ac614476c7
font_01_sfnt_off00010121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10121 11060 bytes
SHA-256: b302f2d1f04a38925726e45e2e49e286761fb14d11211f80c422dafc2c2e5b58

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