Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6072d6d4e7fe06…

MALICIOUS

PDF

65.7 KB Created: 2021-01-19 00:14:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a5c0abf5602cb164e2fe66391212fb64 SHA-1: cce1ae24b3b9396bd96c78bb06f151e30e884206 SHA-256: 4b6072d6d4e7fe06f4d7639df04705181d186e300488e2fa365f796fd6dac4dd
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cdn-cms.f-static.net/uploads/4414174/normal_5fa6847969276.pdf In PDF document text
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/95a3227.pdfIn PDF document text
    • https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/zovimegur-dixoselasi-dixudiw-vogosizetes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423714/normal_5f9c01fc4fc8a.pdfIn PDF document text
    • https://lasajiboz.weebly.com/uploads/1/3/1/3/131379041/jujivad.pdfIn PDF document text
    • https://cdn.sqhk.co/luwibajik/EEhfihJ/luwanigabezari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454561/normal_5fe828e013b09.pdfIn PDF document text
    • https://kuzeloxowew.weebly.com/uploads/1/3/4/3/134330257/dibejav-lapafemutukoji-denid-benuserir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409610/normal_600248ce89e60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459796/normal_5faa16a3314b7.pdfIn PDF document text
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/kikelavuvevuxoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/Hjihjww/biguxego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5fbd6de09249f.pdfIn PDF document text
    • https://pudavupotel.weebly.com/uploads/1/3/5/3/135335197/gokewata-migov-niwafixed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373526/normal_5fa2097272080.pdfIn PDF document text
    • https://trafftec.ru/wb?keyword=alien%20armageddonPDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/xuriluzilate.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/pagli_dance_bhojpuri_song.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/javuvagejagojivijasu.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_off0000c25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC25F 5360 bytes
SHA-256: 7665dd2d149401be1809b01ab0686a36932d9c6459052ec657775e3184a8d9bc
font_01_sfnt_off0000d48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48E 11032 bytes
SHA-256: 6ced6bdff3f625a823df12253e613e9802096724abcaf52e49fc3f79fd533415

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