Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b55950b479005a…

MALICIOUS

PDF

94.5 KB Created: 2021-06-27 01:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c6a3b514d3f4b074517eddba5188ffee SHA-1: 150f0ff0969ba3a06886d960d429d98ea9387068 SHA-256: b9b55950b479005abac5aa1b21af55b01052a51190972b431e5ecd8f7b9ced78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URIs and link farms pointing to potentially compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it is designed to redirect users to malicious external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://crysiq.ru/uplcv?utm_term=heart+of+darkness+quotes PDF link annotation
    • http://webinaris.org/ckfinder/userfiles/publics/files/37670430793.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076250ae4df7---42823151212.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/df9b989520adb7e1253c6e2e92b3759f/xinet.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/21702051853.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a721404780b---65450748401.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/1sq7hg1plbipejfslnh74835l2/famegapeg.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd1e2ae470---nesolevibugomolatowitud.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a168b21a759---93328919861.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/91ac2e18a4bfc5260ffe42fa09e96ee1/60331845905.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c75cef42aee---80335886144.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/nonikirataditadovel.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/47646128580.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076628e7d74e---demakoxivalufovupipovo.pdfIn PDF document text
    • http://minutemen-jrotc.com/clients/84940/File/vazegapivan.pdfIn PDF document text
    • https://aashianarealty.com/file/1082157642.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/vilitusubofolutumepameso.pdfIn PDF document text
    • http://majorpropertygroup.com/userfiles/files/25578452335.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210607102355_epx42m.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b2236e1e913---rusaxarexibunikudaputi.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/lobosaditobuponetuperaso.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/c20712862a143a13746f85a118aaae49/rafenogedojevowo.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda3fc8550b---xasowoxaxifidi.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/h8318qimmbfljvc52f16unpqd7/vuwikurotebizevufuvota.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/jenebunedel.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c321244e0---65795923543.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaa589fa41---loneroromavelogak.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_off000111e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000129fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FC 10536 bytes
SHA-256: c941184ad7e46c18af1e7f9c40197e0d6c9b9a4720597fd36031a5d2f1da9c3c
font_02_sfnt_off000141e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E5 17304 bytes
SHA-256: 49914bab94c25284d5c983448e1b8c97a398f4b90b6039be703711bfb1b3c475

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