Malicious PDF — malware analysis report

Static analysis result for SHA-256 84954e03bd7a5235…

MALICIOUS

PDF

64.6 KB Created: 2020-12-05 21:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6985e49285ae0e680cd0877bb5bc4c98 SHA-1: 674fe7006c62a48b362ae71b4d983e3877649917 SHA-256: 84954e03bd7a5235fa7a5a8f0d4330b0119c661cecc8c4cea84e730a95cb449c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to SEO-optimized PDF documents, suggesting a link farm or spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL 'https://trafffi.ru/wb?keyword=water%20cycle%20information%20in%20kannada' is a primary indicator of the lure used to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=water%20cycle%20information%20in%20kannada PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378620/normal_5f93fe6fd1b70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485589/normal_5fc297e0b2857.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/dujulovukopofelig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_5fbdcbbb2aa5c.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/5fc0e99a0a2757459be2ef6a/t/5fc24c46173fb5383beda050/1606569031465/65615559399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/220160a2-2131-4b7b-b419-1622518c180c/bajif.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/corel_paintshop_pro_2018_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/back_stretches_lower_back.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def47aa9-9798-4da1-b143-7accde8ffc75/marketing_analytics_data-driven_tech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f2837e4-fe7f-4543-a6c2-b0f2e0ad0cbf/nirojisenagirolurozono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b01993a-df6b-4aa7-9910-f5ffe56567ba/5635883776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ca4e37-109c-4335-b5d3-46e66882f4b1/clojure_for_the_brave_and_true_download.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_off0000c2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BE 5168 bytes
SHA-256: faed935b628c998613b0153fc68d33c825847c6d63e030c94d466949582ec1db
font_01_sfnt_off0000d456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD456 9824 bytes
SHA-256: 0f1db76c31ac1e0d7a59da2dbe1276b9e14eca6d1ee14a5a9666995bc9135abe

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