Malicious PDF — malware analysis report

Static analysis result for SHA-256 449393b9d583299d…

MALICIOUS

PDF

84.3 KB Created: 2021-07-02 04:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 51003931ff0211cbc98ed50210d92894 SHA-1: 7a43ff27ad66420eaae4b7ce78fd7c0aacc4ee2e SHA-256: 449393b9d583299d26b27befa939901a3538e29e1a7a848a4a841a7f7bd0ef28
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure itself is also noted as potentially compromised, with duplicate object bodies.

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://elminhaj.org/userfiles/file/winovidatetetosawobu.pdf In PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/f50ca87e369f6f8d178e4802b9cb782b/poduva.pdfIn PDF document text
    • http://iphysiology.ru/upload/35689922591.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/21944845968.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/mra1tvdostajg7j0tfte86pj03/37906444902.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/25ff98eceefd0215dd7572ec445758c4/fokur.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d617ab26946---fafadadedexi.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/dowuzapamununeluxomomom.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/28f58c3d1e0df01bc36ee74b5086c06e/54068895922.pdfIn PDF document text
    • http://manajrgvaaradhi.com/cms-uploads/files/fugojarevovib.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/zarejokinevazobivol.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb787a90f---43852754974.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/38600d3b9f89a3bba347bcc6018a6ef8/91751737076.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607242e0909de---pugibowajofinom.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/j5ua8laphtb7obppnojqk51sa5/wuxakerasebuz.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/15113176584.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/fezuronakebarim.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/26e2e1013dd6ee758c9a55ebacf823b7/sewasalevadusowatep.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607793c438a20---badinowexasematunegen.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16099cc0828e3d---15632841401.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a922015db2f---rizefanepetumofe.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/zafutadikonaj.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/zoxotenuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=period+inside+parenthesesPDF 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_off0000e88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001009c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009C 16900 bytes
SHA-256: 9d98607f6dde8fbf1bd67f714b5737551fe49fea421ee76e3f73a0f4dda729b4
font_02_sfnt_off00012c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C7E 10444 bytes
SHA-256: b84e183873d898266d90e9b86e553cf37bd0f7016c4af8dff916365333202483

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