Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7bd7dde88d11e0…

MALICIOUS

PDF

79.0 KB Created: 2021-05-29 03:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 01ea658b9b34733908b14147afccd729 SHA-1: c0e6ce5a79243830c172182166b79e598d9c2168 SHA-256: cf7bd7dde88d11e02e4a0fafa43cc866750d10d2b2d68a45070f198e62367e05
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, presenting numerous external links under the guise of search results for a game download. The primary URL, https://ponafet.ru/strik?utm_term=fnaf+sister+location+apk+download+android+1, suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to sites hosting malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/strik?utm_term=fnaf+sister+location+apk+download+android+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481821/normal_600ddda9199d1.pdfIn PDF document text
    • https://nifanepuram.weebly.com/uploads/1/3/4/7/134700908/togivipuwur-muvenelubal-lupujog.pdfIn PDF document text
    • https://lawoxotat.weebly.com/uploads/1/3/4/5/134587222/sopupuxusizu.pdfIn PDF document text
    • https://risenezapaf.weebly.com/uploads/1/3/4/4/134481661/fapumisibunan_viwaga.pdfIn PDF document text
    • https://pizugezufe.weebly.com/uploads/1/3/7/5/137501548/9981942.pdfIn PDF document text
    • https://jozugirizozixus.weebly.com/uploads/1/3/2/3/132303278/7096b467a386.pdfIn PDF document text
    • https://vonulimuwudepaf.weebly.com/uploads/1/3/4/1/134131723/8517849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458150/normal_604d5fb71e8c7.pdfIn PDF document text
    • https://risebezisenozo.weebly.com/uploads/1/3/4/3/134375164/geguwuxumaw_vapekumifal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_60653eecad9af.pdfIn PDF document text
    • https://vukegodepobaxi.weebly.com/uploads/1/3/4/6/134676750/515f107230e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460968/normal_6035e94ce9f2f.pdfIn PDF document text
    • https://sufogewanogona.weebly.com/uploads/1/3/1/0/131070160/566522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5fd0ad1ee4772.pdfIn PDF document text
    • https://foxakiletomuxo.weebly.com/uploads/1/3/4/0/134012751/bizuxajelidewivebif.pdfIn PDF document text
    • https://zifidobu.weebly.com/uploads/1/3/4/3/134371145/daxubajiwupotuxuj.pdfIn PDF document text
    • https://tejekukukageza.weebly.com/uploads/1/3/4/6/134662245/teguvetetalepemuki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449777/normal_603f54547962a.pdfIn PDF document text
    • https://bekariniwoxisit.weebly.com/uploads/1/3/2/7/132710774/1921905.pdfIn PDF document text
    • https://xoxizanelanoruf.weebly.com/uploads/1/3/0/7/130740612/sizijufojoroxe_disopimurofafen.pdfIn PDF document text
    • https://bajevopado.weebly.com/uploads/1/3/4/4/134456845/3381796.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/654fd583-1897-499a-8e60-1a7fa2ea6430/25880269211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90cce629-d442-4e79-8959-a3ea663820fc/53885232132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80853c5d-a027-4498-8b62-0a2e1235d0e1/c.a.r._form_lr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c0008d-83c4-4f5c-97c3-8fbd3452e092/mabizutosogexawonotenetes.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_off0000ed8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8E 5312 bytes
SHA-256: 839d8e8ba71c7e9e25a4c0c72007f041254580198f719f0d746285bdb3f15e25
font_01_sfnt_off0000ffd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD0 14864 bytes
SHA-256: 15d7cedd1baa81744d9be1c72d10f28c7ea35421ce4acc0475738b59803acded

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