Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99f61dd733ef063…

MALICIOUS

PDF

83.3 KB Created: 2021-10-17 05:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-14
MD5: 6f7a4d371d5493b4d5ac641f1b5f4358 SHA-1: b45c97c637a26d5ab3e08a3d2a2b75d5a82cbaed SHA-256: f99f61dd733ef063a85a60cc1cc0ae2dec52391c45fd49a9abeeaf155511339a
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • 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 http://madmojo.com/fckupload/file/nepowekap.pdf In PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/59404855730.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/lobamozegutogumavof.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/jorirexowozutamo.pdfIn PDF document text
    • http://geasit.it/userfiles/files/6285851380.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/sexirezitume.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16153f54b8faad---tediwazotefusepewosel.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/dofawebeva.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e06cf24022---31256615586.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210909080707.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/83940797317.pdfIn PDF document text
    • http://hbisan.com/userfiles/file/jiwotafejudonamina.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/2647104639.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/zaxafapugugik.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/fugeleguzur.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/oee4e36cpa75lt0jjk0iv5tu95/vuvekutamorugudajanamube.pdfIn PDF document text
    • http://lovesenergy.com/file/nakunawuxi.pdfIn PDF document text
    • http://fittbikese.hu/files/file/59336511941.pdfIn PDF document text
    • https://perkunasstudio.com/uploads/files/202110091420328726.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/e1ba69d7e7061264b7c5b55f45cb53b6/xusulopopiwip.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/16667499045.pdfIn PDF document text
    • http://pegastelco.com/pictures/files/31809646169.pdfIn PDF document text
    • http://craft-personal.de/userfiles/file/6651198693.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16135c254af200---37288861335.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/9e868f31a8d528022b67196724b489f4/4778468197.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/bigadopaxudujep.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/60446786069.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/BcFPVxLj4jw/uplcv?utm_term=hc+verma+physics+class+9+solutions+motionPDF link annotation
    • 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_off0000deca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 11080 bytes
SHA-256: 3b9b8de1241f5e91fc7aa35df7c72f475f6c09540e16002dda69bd8a7b6c8e1a
font_01_sfnt_off0000f875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF875 18080 bytes
SHA-256: 91a2442e0fcba7310581af685704dc175c0068fbbe33b966859b36fa20524808
font_02_sfnt_off0001275a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1