Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bad2cbc53ab1d39…

MALICIOUS

PDF

92.6 KB Created: 2021-07-01 14:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d7e3541267a6f491a6f4a48eecb8b222 SHA-1: a118a3cc17acbd4987c3b10142218dd234b89d3e SHA-256: 8bad2cbc53ab1d39b69420964d7fc41741de5c266035a4005dc24f42e9fef776
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs that point to compromised WordPress sites, suggesting a link farm designed to redirect users to potentially malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate an attempt to obscure the final destination and potentially engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8f022c44e---66478856878.pdf In PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/24b990d0d3e78cbe4be01e965964e3db/pajizipemazatibamok.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/14159051310.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/gufasujo.pdfIn PDF document text
    • https://menu2uplus.com/images/file/nonufemur.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/2mp9fll1s0b1cnhhd9dpka7r27/88463615333.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609099f9e086b---nilir.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/kametifeladega.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608833030ccb9---pitavadifulogofivezuriwo.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/fadumojoxanuz.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/faripesisegedemetapov.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608560c1d8d88---tidobekorodifipud.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/dibasolakekurazizew.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/54380321596.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9ac3242cd---36598295538.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6a36d622b---44319372035.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ce5a993f62c---96608749998.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/fec210e6c1625d6ae8b96cc72aacc935/65295657279.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/86951143986.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080f2b799b8d---zogomur.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/a11c2ca15ffabffeb29c81eb77ef3619/86006160397.pdfIn PDF document text
    • http://salinahighschool1968.com/clients/3/33/33fcb9b832a528c934b1ac42c6b88a99/File/66942170094.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/37052411dabac26a63d3eb39cb2ccfd9/38575086251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=workout+partner+quotesPDF 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_off000106ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EE 17380 bytes
SHA-256: bb10686618c22856421c74113a15f9217f08242503a2cfb1732569a5a56880b1
font_01_sfnt_off0001341b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C32 10440 bytes
SHA-256: 217ef2f75cd09b458035e83e3041389aadee9949e3af6c73fbd45b077350cada

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