Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce875beb02d614e…

MALICIOUS

PDF

84.6 KB Created: 2021-09-20 02:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9db13b98c74e57a77eb98ebaf8f7acbf SHA-1: 62c9d7ae45d63348976812c16ab7a43fc3921a07 SHA-256: 2ce875beb02d614e4e0d3a635b1212abdcf8b70a3c4184023d980b20221b7f14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these external links. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://laborke.ru/uplcv?utm_term=free+car+games+for+5+year+olds PDF link annotation
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147ad87c90ff---pojogexijakigaseruru.pdfIn PDF document text
    • http://sdes.in/uploads/46061431886.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/ragefemivipifinoteneni.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/bozoburifojorasipo.pdfIn PDF document text
    • http://thucancakoihikari.com/luutru/files/finufiwuwivebapabuzitul.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131ff3fade6b---47353120694.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/48e195e8d7d93d122b3a37b8b71f996e/muliganejivolavorizev.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/90645949862.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613995fb104f0---gujosapopup.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/ganojub.pdfIn PDF document text
    • https://ambalatender.com/upload/files/zorerani.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/eacb1c7936be20ec7910313ea82d815b/juzoravezumorosawew.pdfIn PDF document text
    • https://guanlai.tw/uploads/files/202109121910353449.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/35650773518.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/mobekebabepiz.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/dijikulakoxanofagovelile.pdfIn PDF document text
    • http://jcpingie.be/public/files/zodaregamigubatabos.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/68872746487.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/26729143344.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/tuful.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16141991936bd9---tezojepipepikumiwimasozi.pdfIn PDF document text
    • http://civicwomen.com/ckfiles/files/kakuraxop.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/powovozap.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/76241179585.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/jamir.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/okpchkcva9pr07j27qvi3f92v0/kufizuj.pdfIn PDF document text
    • http://e-sportis.com/images/upload/74034160498.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE715 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF27 17292 bytes
SHA-256: ecc4ce003a3c1b5c7418b49390981cffb69a0485a336ba7c83de2e1b3b0069e3
font_02_sfnt_off00012c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3E 10752 bytes
SHA-256: e4e65c7ea7b81c58173e3f30f1f0c92ecc4e16ba2def11a2892d207220c6260c

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