Malicious PDF — malware analysis report

Static analysis result for SHA-256 d265383049d9cfd5…

MALICIOUS

PDF

84.9 KB Created: 2021-05-09 03:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f224b6ebb7958b4858f9b2790f7d86f1 SHA-1: 23452972a75d6be6b048b23e98b9e91f05431c6c SHA-256: d265383049d9cfd55f89e475a9129483639afc4a3c7592cad35ccaeaf1a11b56
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. The PDF contains numerous embedded links, with one prominent URL pointing to a suspicious domain associated with phishing. The presence of many links on disposable hosting further supports a link farm or phishing lure strategy.

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://seumenha.ru/strik?utm_term=scl-90-r+test+online+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370543/normal_6061bd48c4f93.pdfIn PDF document text
    • https://xolesozetenosox.weebly.com/uploads/1/3/1/0/131070434/2829696.pdfIn PDF document text
    • https://rebodegumirimak.weebly.com/uploads/1/3/0/7/130775130/pekabok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_602bdd0fd2099.pdfIn PDF document text
    • https://jepukarebav.weebly.com/uploads/1/3/5/3/135321711/8499632.pdfIn PDF document text
    • https://toviladul.weebly.com/uploads/1/3/0/7/130776498/015d031a768.pdfIn PDF document text
    • https://notaxivarem.weebly.com/uploads/1/3/4/6/134633458/4677594.pdfIn PDF document text
    • http://rutekotugu.22web.org/36537324295.pdfIn PDF document text
    • https://janepowowufevi.weebly.com/uploads/1/3/4/5/134506071/mininiji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375514/normal_600a68ee3baa9.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/jdxPXjb/color_that_goes_with_red_outfit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466411/normal_60627d0c3514b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_603759864d9c4.pdfIn PDF document text
    • https://vepidatebodosa.weebly.com/uploads/1/3/0/8/130874400/xuguwirivirogos.pdfIn PDF document text
    • https://cdn.sqhk.co/lagusive/igtZbge/8466198987.pdfIn PDF document text
    • https://wokulenazaxur.weebly.com/uploads/1/3/4/7/134744474/wepeni.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/rilexazejuzovep/96358884108.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/literature_quiz_questions_and_answers_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/nys_pistol_permit_renewal_form.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/car_emergency_kit_list_reddit.pdfIn PDF document text
    • http://govuwetubor.epizy.com/medical_term_list.pdfIn PDF document text
    • http://runogonu.epizy.com/54136080669.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_off00010dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD7 5100 bytes
SHA-256: 7788593348e972d72a2d62a730df7d351671462c4e7aec6470c12237f920aa0d
font_01_sfnt_off00011f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F48 11880 bytes
SHA-256: ab2343f72dce60f3b977146b2c4048fd13075c602ae2fc131821de979c6ca130

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