Malicious PDF — malware analysis report

Static analysis result for SHA-256 59047cf3ac86580b…

MALICIOUS

PDF

86.7 KB Created: 2021-06-28 07:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 537ea700c1a3d31b00758a26abb3b807 SHA-1: e6e72c6257ce81f3a3657071706ad14e0e7fef0a SHA-256: 59047cf3ac86580b5df898f29be6f6528aacfeb8f8f9253d4e0c8811fd89e48d
216 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The 'Clipboard command execution lure' heuristic suggests the document instructs the user to copy and paste content into a shell, a common technique for executing malicious commands. The presence of numerous links to compromised WordPress sites and disposable hosting further supports a phishing or malware distribution scheme. The document likely serves as a lure to trick users into executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889f1f47952---73907203883.pdf In PDF document text
    • https://xo-sound.ru/userfiles/file/guwawuzewamevu.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/fe6556ca6a1747f99efc07cc8a5e1bb3/rabinojebafulasoba.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/lixovurul.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/d350c59aae2f05c01d53741ff2a93dfa/zusikanufawoxigutevijus.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/a81f86c071777759a9bbd6bec7d629c5/1274742160.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd76404c9b---gusime.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082468bddd1c---vuxumol.pdfIn PDF document text
    • http://whatdwellswithin.com/file/58546257428.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/kafevogabediwotosunut.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/b4fea85384a5aed66b73842d1d92f65f/89968984173.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///44453551094.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608576d623c25---84487040537.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b012b62759---webatavot.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/kosawomel.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/nepumeduluzixane.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f99b9a33d2---5629507107.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/78852459152.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/vubanuwive.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/jegubamuloxoviwopu.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16094b4768c0b7---95918846911.pdfIn PDF document text
    • http://sparkpro.lv/content/file/56293033332.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b253ef05086---55479094039.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/b26d31d3b59ab5cb8fcd6745fb2441a8/wutukumofijepimutopo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=share+folder+pc+to+androidPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3271fcddbd---pusaguvomok.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_off0000edd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EE 10624 bytes
SHA-256: 8a0ef0440ff99a37492060f3863424d3093d94b78610f28c7546ca4a41ff1f94
font_02_sfnt_off00011e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1B 18064 bytes
SHA-256: 03f4ae7b1c77e04e78e2e603c8cb76e5af7da5cda480d03d301fa06ee3b9875a

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