Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a701af6c110f0c2…

MALICIOUS

PDF

69.1 KB Created: 2020-12-07 03:48:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bd4ca8ffe77624f4b6a3705658b1bfb8 SHA-1: 16c586f003a06c86315ca14113ec723aae6c08a3 SHA-256: 9a701af6c110f0c2967ba8c500847dab4a549a926a00ac5eb73de701baf98ec5
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded URLs and the PDF structure indicate it functions as a link farm, directing users to potentially malicious sites like traffset.ru. While no scripts were explicitly extracted, the PDF's nature suggests it may leverage embedded JavaScript for redirection or exploit delivery.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffset.ru/123?utm_term=other+words+for+huge+fan PDF link annotation
    • https://bunewifuji.weebly.com/uploads/1/3/4/7/134709558/bd503c285b46.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/juroruvipilesug.pdfIn PDF document text
    • https://wimixexaselu.weebly.com/uploads/1/3/4/3/134324609/b9e0dc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412900/normal_5f9d53c91e3d6.pdfIn PDF document text
    • https://lodoxaravejow.weebly.com/uploads/1/3/4/7/134719504/4405779.pdfIn PDF document text
    • https://gilijopagexoda.weebly.com/uploads/1/3/4/7/134713479/c2c70448f.pdfIn PDF document text
    • https://vizedaxitexoter.weebly.com/uploads/1/3/4/7/134740617/zugixujer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_5f927b0276f26.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/93c99ef21b44994.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/64637005-8ef7-4edd-afad-cca4041c2221/pagizatajetegezuverelad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3575337-731d-4e30-b97e-0906e7557d62/651390875.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee23f81c9a2a0c66f672/1606282787502/hercules_pelicula_completa_en_espaol_latino_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c7b66a0-39b7-490e-989f-4cb779f6a1c5/sinelalox.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_off0000cfc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC0 5256 bytes
SHA-256: 81e1b807d0219e95b37e50434fa244e1c3dfd782245c5fb0c46ca724084d347d
font_01_sfnt_off0000e1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AC 11328 bytes
SHA-256: 5a58598aec7ae7613474da819c640eaab706e2cd38a0bdda1f7f88d8f7e06399

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