Malicious PDF — malware analysis report

Static analysis result for SHA-256 9720bb3c2e82d888…

MALICIOUS

PDF

71.5 KB Created: 2021-03-28 02:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2edca4b034f9f4eee83358a296975932 SHA-1: 1794c17c321489930970df6b6f7ef98d8fb9c5cf SHA-256: 9720bb3c2e82d8884b75b68f2d27697520dadcdb97eb612c471987b447d8ef6a
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one pointing to 'ponafet.ru', which is flagged as a malicious domain. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=processes+of+science+pdf PDF link annotation
    • https://cdn.sqhk.co/fiporalisu/ieoiagg/oneplus_silent_button_not_working.pdfIn PDF document text
    • http://tubujefowabe.medianewsonline.com/72952411585.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/supix.pdfIn PDF document text
    • http://sikutamilom.iblogger.org/danofemituloremewemorolez.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/tgj27jf/jotitojiguxixiru.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/36779739430.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/pegj0gh/tijegexamarutekafufose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/46644478853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6cd8020-aa1c-4471-87a0-b76773627c74/what_is_us_postal_service_priority_mail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6060ce28-64c8-4003-919b-a176b622ffca/71760811774.pdfIn PDF document text
    • http://taduduxedabed.epizy.com/como_converter_um_arquivo_para_autocad.pdfIn PDF document text
    • http://sapoziwuzodol.rf.gd/jlab_jbuds_air_true_controls.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/jarun.pdfIn PDF document text
    • http://fofomekurun.rf.gd/45298094197.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/calories_in_dunkin_donuts_breakfast_sandwich.pdfIn PDF document text
    • http://budavazej.epizy.com/vazikofevefugepeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b147dff-fcc6-4575-9b0f-4bb916349c9b/feguzowewojegixifoda.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/25073394308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/737aa79f-5953-4eb9-a40b-85267ccb9313/resource_dependence_theory_higher_education.pdfIn PDF document text
    • http://punegejofuj.epizy.com/gomumirima.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/tobopuranugimalidokan.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_off0000dad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD8 4908 bytes
SHA-256: 959846455a913fa6079956caa9df9c1fd54d779f5ff3c3593be7baa7da8913f9
font_01_sfnt_off0000eb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9F 10744 bytes
SHA-256: 7cbc746f7194a84f78d84005179f324b9d4beee92d571864033c00c26ad4b36f

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