Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8e69f3bf458a43…

MALICIOUS

PDF

62.9 KB Created: 2020-11-20 09:36:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0c79ec5dc8df6fe98e3452e728fb65f SHA-1: 426b274685e2cc08992fe8e4b0f37e3df3fba15c SHA-256: 4f8e69f3bf458a430b183d343d5d05bc182e8976e7e769a6154cf6797fe6f06d
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on Weebly and other platforms, suggesting a link farm or distribution network. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs and the heuristic indicating a 'PDF_SEO_LINK_FARM' strongly suggest the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8553

Heuristics 4

  • 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.
  • 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
  • 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://traffine.ru/123?utm_term=how+to+make+roman+sandals+out+of+cardboard
    • https://pabifiliponisod.weebly.com/uploads/1/3/4/3/134367040/534966.pdf
    • https://koxarakofawel.weebly.com/uploads/1/3/4/3/134310925/xaxewamapimu.pdf
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/bedijenutowulixa.pdf
    • https://xigowobil.weebly.com/uploads/1/3/4/6/134645495/8778330.pdf
    • https://wusinetowaje.weebly.com/uploads/1/3/4/4/134471696/5925454.pdf
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/964a2834.pdf
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/zeratewun_wemisedakamex_sokudunodegux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lixuduwonifa/photoshop_cc_2020.pdf
    • https://uploads.strikinglycdn.com/files/33b403a4-a6e8-4f52-9263-c388153f4bf0/65257105767.pdf
    • https://s3.amazonaws.com/xifigabamux/m715_truck_scale_models.pdf
    • https://uploads.strikinglycdn.com/files/c85ce0c0-0fa2-4d6e-8801-b629a75712b4/math_olympiad_problems_book.pdf
    • https://uploads.strikinglycdn.com/files/62c2973f-a6b9-410a-a951-13481a95cb8f/65539929512.pdf
    • https://uploads.strikinglycdn.com/files/f0d1f3ca-a1f1-45ff-beac-ba79c96bd554/blue_bossa_chart.pdf
    • https://uploads.strikinglycdn.com/files/dcd2259c-e873-4ef2-9b85-a3910832d91a/84327322460.pdf
    • https://uploads.strikinglycdn.com/files/726fd0bf-dfb4-4d8a-95c7-f5a0cc3769a9/derecho_de_familia_en_colombia.pdf
    • https://uploads.strikinglycdn.com/files/ca69af42-c498-4814-a4fb-0faf8f6336eb/migefeg.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0be.bin
cb969dbfb74ccdf8d9eccc8345a94d9be202c28dc160e9b03beb010d5977a06a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BE 5424 bytes

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