Malicious PDF — malware analysis report

Static analysis result for SHA-256 294512611cfa6546…

MALICIOUS

PDF

77.7 KB Created: 2021-02-28 05:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3c015b2e4e3b68ea3bcdcd701c0f2dec SHA-1: d2c26644195eaee8b0cdf7eb91159fcc3bffe07e SHA-256: 294512611cfa65465192e3b5a9ff14179a2451fde2092f2d2c9cf4b00f1a3a57
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, pointing to various domains. This behavior is indicative of SEO manipulation or a phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, with the primary function appearing to be redirecting users to potentially harmful content hosted on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/123?utm_term=2012+hyundai+sonata+hybrid+battery+warranty+transferable PDF link annotation
    • https://faliroralomi.weebly.com/uploads/1/3/0/8/130874474/gaferamufuw.pdfIn PDF document text
    • https://lelodudovoveju.weebly.com/uploads/1/3/1/6/131607117/pimonikabak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412173/normal_602c92156a5ae.pdfIn PDF document text
    • https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/migekutoweduzijug.pdfIn PDF document text
    • https://vezitiratad.weebly.com/uploads/1/3/1/8/131856143/kewugak.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/osha_safety_manual_template.pdfIn PDF document text
    • http://vifezitenof.getenjoyment.net/stages_of_the_grief_cycle.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/desavikunonuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373782/normal_5ff97ed56d9f3.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/80167986614.pdfIn PDF document text
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/xezizatuzuzexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_6027b3c7242eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489717/normal_600760833de38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369788/normal_5ff5c580227d7.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/eyelash_extensions_certification_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_6038116b831cf.pdfIn PDF document text
    • https://jidegumot.weebly.com/uploads/1/3/0/7/130776526/5a387d93e52.pdfIn PDF document text
    • https://kirejoji.weebly.com/uploads/1/3/1/4/131483098/3e826d6aba11.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/maytag_centennial_dryer_customer_service.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 5560 bytes
SHA-256: eec678a343c9931c5eee75f58add63687fab7396c35950ca7ff8be51b98ec6fb
font_01_sfnt_off000103ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EE 10760 bytes
SHA-256: 1bfe50e73a799ee86cc683bd1a4d5a199c109ca1be52844efe2b1ff6c988c4a7

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