Malicious PDF — malware analysis report

Static analysis result for SHA-256 44581993ee950372…

MALICIOUS

PDF

71.9 KB Created: 2021-12-11 06:42:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: bb079da5b77009dce3c34893b4713f5a SHA-1: 85c481513a8d13be08f13e2596fb90d5112956f3 SHA-256: 44581993ee9503727e783177bd313273a78d26e583e7d6d0ad0f74d1814e357d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to potentially compromised or disposable hosting sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to direct users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://clinical-pain.com/pds/userfiles/files/taxizaguwidawezuma.pdf In PDF document text
    • https://tennis94.fr/img/pics/files/470756355.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615c026e3d4c1---vililadexinokotaxazik.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/xagitiderumuvorowadazo.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/nonedipewadapele.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/gutagexepugazu.pdfIn PDF document text
    • https://cosmopolitanhotelbg.lastrada.bg/uploads/wysiwyg/files/96619343304.pdfIn PDF document text
    • https://ateliersmq.com/pevron/www/img/file/zemusoz.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/d1e61571aadafb5d3b6769804f10aacb/lovamolagogitasidi.pdfIn PDF document text
    • http://riverla.vn/uploads/userfiles/file/dodovefexugetesexo.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/kifoma.pdfIn PDF document text
    • http://yachts-trade.com/files/ledosulejixubujunepab.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/fmi52aurjonhvi55ikv69nd4kf/godijadufojapoparidilavi.pdfIn PDF document text
    • http://regmac.net/userfiles/files/wizenug.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/lerurixi.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/pizifipuzokenisixosidofuv.pdfIn PDF document text
    • https://sk-elektron.ru/ckfinder/userfiles/files/62375544519.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/97224290069.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/fifod.pdfIn PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/xazodevite.pdfIn PDF document text
    • http://livilgirls.com/files/46069866367.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210907_6F6B95E7F8C25C24.pdfIn PDF document text
    • http://panova-art.com/files/file/93025358864.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/17261194531.pdfIn PDF document text
    • https://ardiinerkh.mn/uploads/userfiles/files/23369418706.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/cmwvf4RlXg4/uplcv?utm_term=emotional+intelligence+2.0+-+with+passcodePDF 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_off0000b337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB337 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off0000c9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D6 17576 bytes
SHA-256: f980db4c5f0ecaaf78a358aa960d3b6ad50b0cbf02c869f6f2c9d6a2b331459f
font_02_sfnt_off0000f791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF791 11272 bytes
SHA-256: 59bab4b7ca4558f910c7cce0b22ce1cedc2bf2ee8f7b408394826f850775e563

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