Malicious PDF — malware analysis report

Static analysis result for SHA-256 3826b49fca47c2b1…

MALICIOUS

PDF

96.0 KB Created: 2021-07-08 10:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 75ac233be4f965cb89a4733096b82b36 SHA-1: db46676b96409116242084f099bc3da9912b0ed5 SHA-256: 3826b49fca47c2b16dd257a9f82c5aaadb7d0131cc7f9615768f33d5dc6b0afb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://inwebjor.ru/uplcv?utm_term=fitness+science+explained+pdf PDF link annotation
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/96cf07fb48dfc4678d728156c9c6c08c/botusekamejikesapaxeg.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/66070131019.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608301c90f0c7---japupazoror.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/papira.pdfIn PDF document text
    • http://rld-carbon.ru/file/fanofanojosawogezumona.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160815e8c2b1e7---vojajasowa.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/14836369495.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/217fb5b35c2f775a4e526dc446d97b8d/19834723220.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/7b3445c3d603261dfe79c23bbe6862c2/88482658947.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/16946561478.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717f5831d9d---80286584408.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/nadekunimeraturodanuko.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/taxuzofafum.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a008d923365---wofavo.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d837cdc0a---tojer.pdfIn PDF document text
    • http://lws-realestate.com/userfiles/files/52146731034.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/vabomitowirot.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/db05ca54a7ec0c454ca977ec30579e7a/7032350844.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/10976457972.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160827d58323ba---84486387734.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/61829912168.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/db47d2677f08714070b6e68af97cc033/vuwemadilopivigotasem.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_off0001118e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000129a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A5 10472 bytes
SHA-256: 262506d267187586e5708288c7e82459c1b8e55eaefe6a97e5e3228a4765be4f
font_02_sfnt_off00014188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14188 18108 bytes
SHA-256: b1be9e5a36448a9b568f4ec4605d68e0854f54a00810bd960f4da0783d31fd55

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