Malicious PDF — malware analysis report

Static analysis result for SHA-256 68fd4e9862f5a172…

MALICIOUS

PDF

65.1 KB Created: 2021-02-13 21:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 41317cc304835c2129cb5ee94ba48c47 SHA-1: 42791250702987a364da214f9bdc03d27dda0de1 SHA-256: 68fd4e9862f5a1726a19867bfe61737e1c043698f94f3169f27e83da49a85234
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://seumenha.ru/aws?utm_term=distributing+a+negative+sign+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447640/normal_5fe58b912e357.pdfIn PDF document text
    • https://cdn.sqhk.co/modebopogut/Nlx1gey/54060303152.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuputid/iiisjfI/labodafexipemed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465924/normal_5fcd99352ce0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465537/normal_60206f8ab97ee.pdfIn PDF document text
    • https://cdn.sqhk.co/mofokamibe/MtdrXhb/lowusozekabol.pdfIn PDF document text
    • https://goponubinolofuv.weebly.com/uploads/1/3/4/6/134695307/figexixusemilex_wobejazega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410199/normal_601cc16e3f44a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392472/normal_5fde9b66a7e3c.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/jddNVhh/11538112054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424400/normal_601eaa4bf1ae9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jolivawojo.rf.gd/56051112219.pdfIn PDF document text
    • http://lusiromipu.epizy.com/33581686639.pdfIn PDF document text
    • http://virirunabeso.rf.gd/lubifigiparifibaxope.pdfIn PDF document text
    • http://lidazadopedu.rf.gd/dogedufalipejifanotepo.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_off0000c1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F8 5268 bytes
SHA-256: 57077ce18c49d841a8ed7b6a4e37f8b95be6bb8294880883d0247a0922d1bf47
font_01_sfnt_off0000d3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FA 10376 bytes
SHA-256: 6392388bf5c469b34ec2b717bd46f7e572e31f4b3c8f6a5bb4b8a784c33ce68e