Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a7835bf6962ded…

MALICIOUS

PDF

68.5 KB Created: 2020-11-14 20:54:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ea5bd9af3d6002feee1d8384b7ed12b0 SHA-1: 7f2349b633dbe9574f27bbef056a9a32020f1856 SHA-256: d6a7835bf6962ded26df8e76848383aea116d99872d1ec3ce7ab96961594c09f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary URLs extracted is 'https://traffnew.ru/strik?utm_term=midway+streaming+vf', which is likely used to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, suggesting the PDF is designed to exploit vulnerabilities or lead users to phishing sites.

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://traffnew.ru/strik?utm_term=midway+streaming+vf PDF link annotation
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/779de6b8001726c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376621/normal_5f89ce7baa52c.pdfIn PDF document text
    • https://vitiwujujoter.weebly.com/uploads/1/3/4/6/134659282/7183112.pdfIn PDF document text
    • https://kufesolujuxubi.weebly.com/uploads/1/3/4/3/134373324/juxurutiwefanun.pdfIn PDF document text
    • https://pepusaneped.weebly.com/uploads/1/3/4/5/134503703/b0d8b3.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/supom.pdfIn PDF document text
    • https://jenevokitajawol.weebly.com/uploads/1/3/4/2/134235402/c44e11a5e5963e8.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/9319323.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/cartoon_single_bed_sheets_online.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/damobixojiwuke.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/logical_reasoning_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/xidanule.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_off0000cda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA6 5456 bytes
SHA-256: 145427f162ec42288bc4071fca760854740a08a7712434dd136245309e925649
font_01_sfnt_off0000e04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04B 11432 bytes
SHA-256: 2b6be55f529c40f16b81ecd601d85055517c7b3f153b7422c5134e9212802081

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