Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c47cb85e94fc8c…

MALICIOUS

PDF

70.8 KB Created: 2021-03-22 00:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 394e8598a3df8927b8eba2f8768e5605 SHA-1: fcc3839b11d9722afa3947d5455e710ab2641fad SHA-256: f0c47cb85e94fc8c696629e26f6b13bfa63b3ed9f2f7c44f4fead7e242bd87a1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a phishing or link-farming scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users 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://maypoin.ru/wix?keyword=security+plus+study+guide+pdf PDF link annotation
    • http://trastenmyqort.online/vapowolobopotafzhs99.pdfIn PDF document text
    • http://navaram.online/halloween_2020_events_mnep1yw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_601b3677eb24b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498893/normal_6029ffb52ab18.pdfIn PDF document text
    • https://cdn.sqhk.co/sugifila/idhckhc/togomafixunew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383702/normal_6053848790cda.pdfIn PDF document text
    • http://skout.tech/vilikanodatozu291h7.pdfIn PDF document text
    • https://cdn.sqhk.co/nifijagik/ahbhgij/easy_skateboard_tricks_to_learn_for_beginners.pdfIn PDF document text
    • http://znakomstva69.space/11376224621t18z1.pdfIn PDF document text
    • http://lightsex.ru/99718866800q1yj.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/hifibgf/retozupilunugoluw.pdfIn PDF document text
    • http://russianpatentexpert.com/88075590605vclpa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426699/normal_604074eb1c67e.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/njgcX8I/dr._kongkrit_chaiyasate.pdfIn PDF document text
    • http://lovelyhouse.online/what_is_a_winchester_ranger_30-30_worth8vqme.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/jTu9Mql/jokonedivizuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451375/normal_5fcda42920821.pdfIn PDF document text
    • https://cdn.sqhk.co/xogatijixe/vjdQPif/ball_bash_brick_breaker_game.pdfIn PDF document text
    • https://cdn.sqhk.co/tirazirevemu/7iajfjd/96066552732.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/aha_bls_questions_and_answers_2020o8ii7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3b472d-3efe-4457-8f2e-e31ce3b9453a/ar15_lower_blueprint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/244988d5-5eae-422a-bf42-fe945aba885c/xewejakos.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_off0000d627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD627 5316 bytes
SHA-256: e697da9c05643216cd29da141b5981ed24a19c8cae4038995e62300299e117cf
font_01_sfnt_off0000e85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85C 11204 bytes
SHA-256: 1fc9849477bfdbee30d8a3883972f5093e853418d1cf106c9ffccd3928e0491d

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