Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1fec1c9638014ac…

MALICIOUS

PDF

66.3 KB Created: 2021-02-27 12:23:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 48d9cc0cafcbb2495608978783d5f27f SHA-1: 4d2bfaf34094084420e187f9070c3d032c56b9b6 SHA-256: c1fec1c9638014ac07c1bd7ee2af699aef481d43a46a06a26ab5cde5c1d524f5
186 Risk Score

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://jacksth.ru/wix?keyword=troy+bilt+horse+tiller+owners+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460241/normal_5fe99f1f60256.pdfIn PDF document text
    • http://tupuwuwegidava.22web.org/meruses.pdfIn PDF document text
    • https://tawedituja.weebly.com/uploads/1/3/4/8/134864040/1f52c67a05.pdfIn PDF document text
    • https://vuxidozeni.weebly.com/uploads/1/3/4/6/134669409/nozimadezuzekaf-fetobetanoti-tijemidejusij.pdfIn PDF document text
    • http://letilemugemin.66ghz.com/what_is_agile_development_approach.pdfIn PDF document text
    • https://guvikaki.weebly.com/uploads/1/3/4/5/134519546/172388.pdfIn PDF document text
    • https://garepogive.weebly.com/uploads/1/3/4/8/134871831/bipetebewizogaxulapa.pdfIn PDF document text
    • https://zanixikowupu.weebly.com/uploads/1/3/1/4/131437740/5416033.pdfIn PDF document text
    • https://wikejawuwe.weebly.com/uploads/1/3/1/4/131437941/28b8fc7ce3.pdfIn PDF document text
    • https://gefivogixofix.weebly.com/uploads/1/3/0/9/130969648/775038.pdfIn PDF document text
    • https://xegokefizu.weebly.com/uploads/1/3/5/3/135323464/nazez.pdfIn PDF document text
    • https://bunivuwavimi.weebly.com/uploads/1/3/4/7/134706582/lokukedexujebufuden.pdfIn PDF document text
    • https://fatuzolawodazu.weebly.com/uploads/1/3/4/7/134730183/8297579.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490263/normal_5fdfdfef0daa8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luzivamo.epizy.com/fimuwovutimirafutevakuzo.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/before_midnight_300mb.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_off0000c8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EB 5208 bytes
SHA-256: 8b299f2703f9ea60d51257eb2d80141f10b3c15eafcf468aa9fba80258a9a86b
font_01_sfnt_off0000da81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA81 9776 bytes
SHA-256: 9d0cdbd61059a7cd5860ea81d3fa55fa0b214f1970ac28a56275e98610220d37

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