Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30e174fed7d83cd…

MALICIOUS

PDF

169.2 KB Created: 2021-04-18 19:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 91a15798bb982f5892baad5c17705a16 SHA-1: 27ba5e38ac2d22f181d8189d6560bcbbbd3b1949 SHA-256: e30e174fed7d83cd347c8a27d060a5bd7180720bfda7ddba9c97a3f7bbb0dcc9
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to a phishing site, masquerading as a search result for "Burger King 4 dollar meal calories". The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish credentials or deliver a secondary payload. No scripts were extracted, but the PDF structure and embedded URIs are sufficient to classify this as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=burger+king+4+dollar+meal+calories PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4392656/normal_5fccda5a73d80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453718/normal_5ffe181143f9e.pdfIn PDF document text
    • http://sidixul.iblogger.org/tubedixawozoraru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_60463e49b15d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423430/normal_605b85b92ef12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449172/normal_601e50b3982fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://netomadutimafe.onlinewebshop.net/les_belles_lettres.pdfIn PDF document text
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_f00509c3328b422a806a205697f116e4.pdf?index=trueIn PDF document text
    • http://zagopemolal.rf.gd/65053554853.pdfIn PDF document text
    • http://jusiwanemil.epizy.com/gpsgate_create_reports.pdfIn PDF document text
    • http://zozoresupiz.epizy.com/fahes_car_inspection_report.pdfIn PDF document text
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_b637008ec7d54a82806a473e679ed874.pdf?index=trueIn PDF document text
    • http://tuvadovu.rf.gd/17353347690.pdfIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_92c2e341e2bb46808aa85d4c6968bf32.pdf?index=trueIn PDF document text
    • http://bumejefivoxigo.myartsonline.com/christmas_certificate_templates.pdfIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_1d833ca074214204b186340aecd618d6.pdf?index=trueIn 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_off0002587d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2587D 5460 bytes
SHA-256: 0ffdb4da0bd98174f16ca0cfc237544436f4555220f841f9406ca74ef65023ef
font_01_sfnt_off00026b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26B09 13016 bytes
SHA-256: b2ae16104f7ea882ba2c49f7204c1d6918f858ecff600adee3a964cc6de467ab

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