Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb9bcf1bb521bb3…

MALICIOUS

PDF

99.6 KB Created: 2021-07-01 21:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4edef0c54fd813e4687b45b8e0a23eb9 SHA-1: 157480db42e5881dc5293fcb4fe9bea3a9308d8c SHA-256: 2fb9bcf1bb521bb38c0a8284b3bfdf198bfcab6e4c7e1bc7ecc7af164c96fcb0
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress upload directories, a common technique for hosting malicious payloads. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's content is designed to trick users into believing there are new banking instructions, a tactic often used in business email compromise attacks. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious content, likely exploiting a PDF vulnerability.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/jhc2evmchm97epqforcgln19o5/14855276028.pdf In PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/0skds7dj627tfqquv83dcqe0bg/voforodanudukimal.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/jemijizalukuxupukelasi.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609826aa9eefa---67064995210.pdfIn PDF document text
    • http://focostrade.com/files/20210629085526.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/97841463813.pdfIn PDF document text
    • http://praguetransfer.com/files/file/rixezanusob.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/mamapotedafixubexi.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc4d186bfd---79677207938.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072ebcc35c56---nugojinedokitaloja.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/6ac6abeddab5193cc9716fc9e72305bd/sotolesawaziv.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/79762415024.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/49s07okbltiu3k5rmfg0b2dfbd/vikuveridatixijino.pdfIn PDF document text
    • http://zae.me/datafiles/file/88436913320.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/80312197411.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e71c6131e6---88287956906.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/23693991215.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0ae9ca36b---28790156819.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f593c1bb8d---95743156723.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606cab8f8b597---62706404439.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/7934f01d303d5b99d420a7b54c837561/ninifomux.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/15063415323.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c36e6ccfc3c---90094672133.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607619a60a8bc---53409430533.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/nokedujatogatar.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/a2b8538b4cfb6968c7d9b42bc5acbe23/sibarifaxipiwosubojefiwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=best+way+to+answer+behavioral+questionsPDF 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_off0001206b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206B 17332 bytes
SHA-256: e3f9d7b8e7f51b87e02c7fd5c347610470b5e27ff3a5e47b97da69d2df6f8c75
font_01_sfnt_off00014d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000165b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165B1 10908 bytes
SHA-256: 5b0aa7c590f01fc7d7c4b88f10f08387d150e348534688a33ca04812624a948e

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