Malicious PDF — malware analysis report

Static analysis result for SHA-256 321f38877a34042d…

MALICIOUS

PDF

72.6 KB Created: 2021-02-24 14:10:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 75b21768be5b90f6c871e29023d78473 SHA-1: b4e3844091bfd6d833d07f7548467df26bec0ee3 SHA-256: 321f38877a34042d193d506f12ec4a8948c209430e5b911071bef3eec2a8f240
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=how+to+watch+game+show+network+on+roku PDF link annotation
    • https://cdn.sqhk.co/lekusovu/2xgfhbv/wezusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_6021f8954db40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489740/normal_6016fcfc446b3.pdfIn PDF document text
    • https://kibalenujodoziz.weebly.com/uploads/1/3/0/7/130776895/780c9de886e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489057/normal_601cf98e3eebe.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/jcjejfr/23074621409.pdfIn PDF document text
    • https://cdn.sqhk.co/pabopimi/ejggep3/werepivugovig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421056/normal_5fdd3bbe66b37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370284/normal_602a75ade5227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470681/normal_601da7767f426.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450139/normal_5ffb6a5d8cf7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_600e4042d8589.pdfIn PDF document text
    • https://lakerevuko.weebly.com/uploads/1/3/4/6/134654656/pitope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471988/normal_60310d5092ddf.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/dhhCigR/25613658830.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zelepabuvokus.rf.gd/vabolis.pdfIn PDF document text
    • http://wexejobi.rf.gd/27335081373.pdfIn PDF document text
    • http://zivufev.rf.gd/a_level_chemistry_notes_free.pdfIn PDF document text
    • http://rofagarurazope.rf.gd/35714222979.pdfIn PDF document text
    • http://xupudajiwozov.epizy.com/50441902756.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_off0000deb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB7 5296 bytes
SHA-256: 243e17afd772e1a1f99e1d5cdaaeae448ac3829f46a31b14d2d793e945617b55
font_01_sfnt_off0000f0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 10548 bytes
SHA-256: e8b835b0518b78beff52eb3b190d7a063e59e1b8e572f203ac08f445b5b9fa1b

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