Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d2d0bc3f838069…

MALICIOUS

PDF

73.1 KB Created: 2021-02-20 20:20:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 11ba3a82cb3c210453a4b04c6fc671f8 SHA-1: 4c6ea05b57778025a261bc60029760cf97d03ef5 SHA-256: 39d2d0bc3f8380699a7beeb9dd3f1f0b1a01d4858d2de50534e30cf84d1fd4e4
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=ps+153+baychester+avenue+bronx+ny PDF link annotation
    • http://logvoz.ru/perujabokagixxfytq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471114/normal_60303288477d4.pdfIn PDF document text
    • http://leafester.online/ejercicios_de_triangulos_trigonometrian4hm9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451766/normal_60031eb7d6039.pdfIn PDF document text
    • http://cardioactiveufficiale.site/icse_board_physics_book_for_class_9mmao9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489981/normal_60052864b6843.pdfIn PDF document text
    • http://doordash.fun/In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367674/normal_600b8f55198fc.pdfIn PDF document text
    • https://gibexiwufanoti.weebly.com/uploads/1/3/6/0/136099712/57c366b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469638/normal_5fe7c9ebf1d2f.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/fun_kid_places_in_jacksonville_florida8mm8p.pdfIn PDF document text
    • http://blablablacar.online/kopulobibudanirujozujgjt0.pdfIn PDF document text
    • http://itnegozio.info/389090426wjzpe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461744/normal_6026f59bc4480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443801/normal_5fe7852d085d0.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/zukogi/gubegopidamodifo.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_off0000e024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE024 5568 bytes
SHA-256: 13337f5be413ac19c5cc15d3aee7d90d6e7b4e67b010b1716d412598953387ba
font_01_sfnt_off0000f326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF326 10652 bytes
SHA-256: 66851ad878dc2c34e73b3e8ddd4f3734ef4cab51b4a05e3bd1bef5b971330fb2

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