Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7656db0702ec677…

MALICIOUS

PDF

87.9 KB Created: 2021-06-29 07:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8faaebef3195b8f9c67bbe94bd8b8ae4 SHA-1: fe87aaa35546b19b867ff9e04cd068f040023fb5 SHA-256: c7656db0702ec677663020a5f20ccb1aa3e5667cfbf565d5306816e2d5613699
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests a business email compromise tactic, aiming to trick users into believing they are updating payment details. The presence of JavaScript and the link farm pattern indicate an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cructi.ru/uplcv?utm_term=notes+of+chapter+management+of+natural+resources PDF link annotation
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076696cf06d2---11930321795.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/e6de68f7b05de8682ee06744ef4db630/60993333798.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/penonivow.pdfIn PDF document text
    • http://skylineidaho69.com/clients/c/c7/c7306e0a9cc1d421caefa9c307ca601f/File/guroxinutabidofor.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/gq835rli1pt600sqj7qa9hgve5/wodutaxokesuxuzobona.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/605f563d112284515ec570d133939fdf/zoxadoxobikozedew.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1620413143.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1c5543f3c---10735142770.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d56bcc53fb8---nolikani.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c6999a3aba8---68309684875.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/kevarotaxupiwelimadaz.pdfIn PDF document text
    • http://healthywithhart.com/res/file/1020255333.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609868270cd48---xuwexazenifewulule.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0225e546a---mirewitopafubagiri.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a764a2aa89f---kidubedewaferebozowinu.pdfIn PDF document text
    • https://tavio.ru/files/file/najiv.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/kogonol.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/12044321658.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/d68b70f7a361b3fa779af9bab239ab44/vowegevekudokafero.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/27675966766.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757dcde8f3e---51875818922.pdfIn PDF document text
    • http://summithigh49.com/clients/3/33/3334069ac8a672cbece4a9536eb221cc/File/20377261873.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b683e797b63---regekofurepekudego.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/zudelelugebalitipo.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/tscujediu7tt5ub3fsu90hin0j/62918854362.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a84c3e3d9a5---kemolozapezed.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_off0000f2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F6 17356 bytes
SHA-256: 041b0d80fc15e8ed68784904aec7a6493886ec803162b02668e778ceaa9caa2b
font_01_sfnt_off00012048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12048 10912 bytes
SHA-256: cb8b4d95ee0937d575e44580a3f21977c584777e5dcdb5dc0013e044ef0221cd
font_02_sfnt_off00013977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13977 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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