Malicious PDF — malware analysis report

Static analysis result for SHA-256 6486413ceb8ec17b…

MALICIOUS

PDF

71.5 KB Created: 2020-12-22 12:00:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 81e9bfc95965876761b5204a7221596d SHA-1: e8c0b8362cf081915100d12d18304ec94df034ea SHA-256: 6486413ceb8ec17baf915da05a77d0d6660bfafc53d3d2e7f337892fcbd5855d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a heuristic indicating it is part of a link farm, directing users to external URLs. The primary URL, 'https://trafffi.ru/strik?utm_term=race+track+motorcycles+for+sale+australia', appears to be a lure for phishing or malware distribution.

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
  • 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=race+track+motorcycles+for+sale+australia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464297/normal_5fa6229ee3714.pdfIn PDF document text
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/91022e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fcef362a633b27d3ae57931/t/5fd60c3f034a586a4f39f86e/1607863359452/jademosana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cacb6b15-351d-425c-bb93-a553755921bb/65555907475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/717f9d25-bbf0-4954-875c-511681a4af02/when_does_wingull_evolve_in_pokemon_platinum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5d2d3c6ccf69f355da2f/1606376749853/what_did_the_northwest_coastal_tribes_eat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc31c7792c50b1a1e85f0fa/t/5fd054796cbf29106bf94b24/1607488635159/jurassic_dinosaur_survival_island_evolve_3d_model.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/farmacos_antiandrgenos.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/7186921932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca8bf94-9419-40fc-a018-52525c13e32c/98355877758.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d06876a3-f675-4aba-b62f-c4fece901487/74476647405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b66721-9776-43f5-8b62-335d8889b9e7/scavengers_guide_to_droids.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_off0000d97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97C 5200 bytes
SHA-256: 7743ec57f92f444c9a8c650cf673749302e1a82a900d51a5bf8715bebcc77fcc
font_01_sfnt_off0000eb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2B 10716 bytes
SHA-256: addd4427fa914d13b1a37311c8e3f9a36d3c18af0aab1981cfd2895ae9f56502

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