Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf260f62a417e2c…

MALICIOUS

PDF

151.1 KB Created: 2021-06-25 17:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a40ecec7b294f3aee2a13b4b5deeadd4 SHA-1: 0e63f69b225e87c8433c27a038b12b00113c2174 SHA-256: 3bf260f62a417e2cba55f9fa746914339e61623728d00fc293138f4ce54f71d7
156 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the nature of the hosting indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8791

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 http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608768330d815---tamepujediw.pdf In PDF document text
    • http://komputerzagrosze.pl/userfiles/file/6192672752.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/3fca21ad8f4ab8b72b33ad111a818ffc/jojajadi.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a760135f003---25450641607.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b5bd313ce---97107563022.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/tejusowafigugexonudu.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/sepebatepatowujojaxeseg.pdfIn PDF document text
    • http://goldmustang.ru/files/files/kegobanedosadi.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160762241bb844---69337061668.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/4641122382.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/7jrjmi4r16m59ci6h1q1aqbovv/7645818298.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5cd204292---pekepugowefigorig.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/90719899832.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/h7gq5dc76h9rkpae4stprula5b/risudibasub.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1d2461f4b---76166706421.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609689eb19cc0---nunipul.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/73b7dab84d90cffc414ffc112187da0c/53208747921.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf7057f4a---zegumisade.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/12024720625.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/0aae333cb3e18fa3362ef5ab7b11e8a1/550925106.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/c62259bf3ab69e13f1f1db2e9e9fef9f/90841522804.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/f34863fa771e6e7c9810fdbb43c8e93a/tibividulesizof.pdfIn PDF document text
    • http://alliance-vietnam.com/upload/files/pazivapudofuvabodexe.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b92cac106a0---duwub.pdfIn PDF document text
    • http://teraval.cz/res/file/sosapufaro.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bdca6c83d---vafogedipabolun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=indian+paper+money+guide+book+2019+pdf+free+downloadPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C090 1764 bytes
SHA-256: 25f153bab7c6b441bf0af0828d3e3272340631574bb0ddf5121e9364682dc2c3
font_01_sfnt_off0001c8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8E4 16800 bytes
SHA-256: 058a61c170a0916afc4796c41ea17be17bc3f5e3dc1300ecadecdcf6d53a965a
font_02_sfnt_off0001e11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E11B 11520 bytes
SHA-256: 4bfb2c2486d02852034c349a2615a9ad25172f451d8aa71ded4f8d974adf95db
font_03_sfnt_off0001fc09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0002141b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2141B 20832 bytes
SHA-256: 191fbefaa6e04ad0453f9036de78180e48eb0f21e20066eba8e32fb9e23e28cc

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