Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb9d2cdad7d5e05…

MALICIOUS

PDF

72.8 KB Created: 2021-03-25 01:23:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 932300d7605c791c92f295ef8c3e667b SHA-1: cd1a6e7b6b7238c95ab52b0290b410db24475026 SHA-256: eeb9d2cdad7d5e05c925063533f64d00ce11a1e42c2b95811ed2c6b4b87516b1
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominently featuring a keyword search for a game, suggesting a lure to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users.

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 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://soxebez.ru/wix?keyword=gears+of+war+aspho+fields+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448984/normal_601efdd869a33.pdfIn PDF document text
    • http://frut-tree.site/kali_linux_android_tools_installhelqi.pdfIn PDF document text
    • http://topcreditcheck.info/book_about_management_information_systemipdyc.pdfIn PDF document text
    • http://prostosite.site/77534481872iq6se.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/8648803753.pdfIn PDF document text
    • http://kevekozulanilim.sportsontheweb.net/english_to_french_pronunciation.pdfIn PDF document text
    • http://xazixovabifin.medianewsonline.com/rijakanusojewabezabarivex.pdfIn PDF document text
    • http://tpdreport.com/bupevejolibopaledx83la.pdfIn PDF document text
    • http://sumomubidisuwo.iblogger.org/c._p._m_full_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_604175901ae3c.pdfIn PDF document text
    • http://kevakigev.medianewsonline.com/bye_laws_of_cooperative_housing_society_in_marathi.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/73007745184.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zanulewetadom.epizy.com/polymerization_process_modeling_dotson.pdfIn PDF document text
    • http://mukenoveran.rf.gd/16946636865.pdfIn PDF document text
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_4539965b6b1649f09a390dc70cdeec20.pdf?index=trueIn PDF document text
    • http://temekerujaniva.rf.gd/linux_administration_study_material.pdfIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_1342bef3f7034f99ad02b844ee376f49.pdf?index=trueIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_4c5cef045b07463aaa6002311ab61777.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_off0000da95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA95 5464 bytes
SHA-256: 08d891c528c17155d2e3c4bb34d9a3fed04663dcd5ab9f4ebb2b1e2b7c889e26
font_01_sfnt_off0000ecf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 11984 bytes
SHA-256: e9f404235e87d9efb48328b3687ec09a0871fc00fd4f58d420fd82268e41cc80

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