Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0aba4359b92a34…

MALICIOUS

PDF

69.1 KB Created: 2021-02-11 05:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bcfce63e6a8473980b9710377b4674cc SHA-1: 1c0dd383dda9dcfdb20b93fe13f0bfe536b43250 SHA-256: 4f0aba4359b92a34e2a08024eb994b8e785ea18cf23dcbf92dda29f1cd1c8347
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://leonvi.ru/123?utm_term=yakima+bike+rack+trunk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490961/normal_5fdc467e16872.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447089/normal_5ffaa1907278e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471710/normal_601ffdbbd7bdb.pdfIn PDF document text
    • http://eduha.online/3176729140rx16z.pdfIn PDF document text
    • http://shoes-storie.club/acting_first_six_lessonscoslo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383915/normal_5fdc758e0c1c1.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/ja7JgjD/mezakitajozofujuribi.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/icPUija/metojomefuvobun.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/qIidW1Z/betoxelarudenixe.pdfIn PDF document text
    • http://keksik24.ru/chrome_browser_apk_for_android_tv12s7v.pdfIn PDF document text
    • http://kelnoteres.xyz/489185033875578c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413468/normal_601910bcb46f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5fccd33147240.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/xonobijikivo/avma_humane_euthanasia_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/98641405506.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_off0000d44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44C 4900 bytes
SHA-256: b985b86f2197f31069c60adf99f5dd656dea6f458cd1679dfd7c1aaa7621a26f
font_01_sfnt_off0000e4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E8 10228 bytes
SHA-256: 432a3ac39e3fd2ee585317c732113f8eabf9be1151a3420ecafec366e4abd1ab