Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21f68f8f6d672fa…

MALICIOUS

PDF

83.6 KB Created: 2021-09-02 22:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5063be11b61fd87bce16f4ca9a4f362b SHA-1: 14144748b7cc7d812dc8e53c7fd3879fa9c69143 SHA-256: a21f68f8f6d672fa4abd51e11043d08c7f813208f48aa1e2e768af57c94c67be
204 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to copy and paste content into a shell, a common tactic for executing malicious commands. Several URLs point to compromised WordPress sites and other domains, suggesting a potential download or redirection mechanism. No scripts were extracted, but the overall behavior points to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc0b89f079---kezavizegixigotefumiko.pdf In PDF document text
    • https://aduanaldelvalle.com/userfiles/file/natomanip.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/sukatijetawukapununifuke.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ecb4bc6167---zapiwesagabero.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/29009848188.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog//file/vovevologonomufabaseremu.pdfIn PDF document text
    • http://renknh.com/ckupload/files/wovezunovajodapoxosej.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/25230875562.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/xewepitewopefarozo.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/a015a4cbb23e803f5b5bbe0ef1390e13/38113036363.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/76775137041.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16072d1822b3c4---zilofaxofofaxesutaxetevu.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/wopasopozevugotel.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/43327606779.pdfIn PDF document text
    • http://miaousland.fr/ckfinder/userfiles/files/26456268028.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc02db40f4e---tobikutepuxinetarebufumi.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/18469123961.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/1467e88b5339235540d77a281254e54f/90609509190.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/80cb83c62f2527c323e6217904420b2a/wizuruzexifub.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/c9d15c3da506e3943bdf28435967c628/zukotanizufuserelok.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/ep1dnjn3nsoksvgviju3ajjko9/laraxagewe.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160ac091879e83---bukenomuvanimozonuzomi.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/3084631265.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/vozalivorifetatujubozob.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/63804288578.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=sub+zero+sz-7524-p+manualPDF 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_off0000d9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A4 20176 bytes
SHA-256: e3ecc13f92dd92e939269fd014a38b9c353170a8cfea46ac69ace00ab6dd185b
font_01_sfnt_off00010f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12720 11016 bytes
SHA-256: 249df8ffe585378f762a580550281f5d5ec7980efd9c8eb0f640f811bb235c60

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