Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e4a8ec5b464c97…

MALICIOUS

PDF

75.7 KB Created: 2021-02-12 18:46:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b993ba2fe7ea878a17dab98d77428358 SHA-1: d601c692f8737b10a8224368845845248987703c SHA-256: c5e4a8ec5b464c9764db07b3727cefcd05117c74a3229e71901a8be962a3956e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various websites, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent. The presence of embedded URLs and the overall structure are consistent with a phishing lure designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/wix?keyword=die+hard+cast+2 PDF link annotation
    • https://navubuxodogonid.weebly.com/uploads/1/3/5/3/135327143/4993954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_5fd8e5f1c73ce.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/j8zjeYe/live_5_news_app_for_ipad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_5fe1240e52afd.pdfIn PDF document text
    • http://gezudozu.iblogger.org/anita_desai_cry_the_peacock_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/2iTCz1p/monster_hunter_world_mods_xbox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501962/normal_6015723ac920f.pdfIn PDF document text
    • http://xevivaxipime.22web.org/xexub.pdfIn PDF document text
    • https://vizekufebatovut.weebly.com/uploads/1/3/1/3/131382320/gozino.pdfIn PDF document text
    • https://cdn.sqhk.co/kamozipu/Hibhgsl/streeteasy_new_york_city_apartments.pdfIn PDF document text
    • http://jobudafeva.22web.org/58474033723.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/ibhiHgj/levarotalesekozu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490738/normal_5feb620699b83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378386/normal_5ffe5fd1b57dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483854/normal_5fe061ee0340d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481834/normal_60045ff49c704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480161/normal_60190be4da3b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lejopuluke.rf.gd/31831203763.pdfIn PDF document text
    • http://dejudunobagozut.epizy.com/australian_casual_employment_contract_template.pdfIn PDF document text
    • http://tejusadesivuti.epizy.com/clinical_guidelines_constraint_induced_movement_therapy.pdfIn PDF document text
    • http://pumajamidu.rf.gd/80000304301.pdfIn PDF document text
    • http://fezekugagow.rf.gd/xibonogudajimufakop.pdfIn PDF document text
    • http://vetuvadoxawiton.epizy.com/estimating_quotients_worksheets_5th_grade.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_off0000ebd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD7 5124 bytes
SHA-256: ee3c4ca572c644504df781dd7e8395e5edca750dad9609bd2cf60171bcac9001
font_01_sfnt_off0000fd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD42 10540 bytes
SHA-256: 7a489d71d59ce4dc39b51844f08849648e76d8e1fcc588b3a6cd9232af85714c

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