Malicious PDF — malware analysis report

Static analysis result for SHA-256 4affebe94d11890c…

MALICIOUS

PDF

69.5 KB Created: 2021-10-03 21:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 646256bbe4d47a286dc59de4964d60e6 SHA-1: 1f192fcd984a64ab530d83863fc28bc944a04dd3 SHA-256: 4affebe94d11890c5993f574310d25a3ab0cfce947a6789cfec34cea197a894c
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 https://huntic.ru/uplcv?utm_term=simple+method+of+square+root PDF link annotation
    • http://www.moyekolodin.com/files/kenunotajewid.pdfIn PDF document text
    • http://52963566.com/upload/file/202110010045126006.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55525509404.pdfIn PDF document text
    • http://na3.it/misc/file/24383875090.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614b96cdcb842---26740108315.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/xirevawipikajov.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/togajutiwagiret.pdfIn PDF document text
    • https://akconta.com/uploads/files/18323768914.pdfIn PDF document text
    • https://bike-accessories.supersites.gr/content/ckfinder/files/gijorojerezarek.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/58369670586.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/mugagugodokobivoxogefanix.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/xiladiwalalumubav.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/nefafemebimovove.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/5289810572.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/sazunililasejopigokaru.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/31255027863.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/68667617148.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/r51hp5p334vi2fmkp11panqtao/78244211069.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/22821811556.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-10-1/20211001010741734264.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/guwenabufawodi.pdfIn PDF document text
    • http://eaupureinternational.com/userfiles/file/kakubebaxosero.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/gr1e3spn2nscsf7mqfis6dqeh7/sipekezejiratumuju.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/nd7nesg0lbdaq5o6b3r5v2b06s/witemozekiwazulazus.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/mogote.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_off0000b0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D1 15220 bytes
SHA-256: ba274cc408b557258eb222656e997ef56f0597b5fa8f81abefde95ad9dfe1fe0
font_02_sfnt_off0000ef32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF32 10980 bytes
SHA-256: 5d1cdf3c557970670d2a81a8fd511fdcefa5bc223e29090921f663ab7c385766