Malicious PDF — malware analysis report

Static analysis result for SHA-256 6392456300eaae5e…

MALICIOUS

PDF

93.3 KB Created: 2021-09-05 12:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 061c207554dc85555a4dafd9bc8bad14 SHA-1: e75e08d7ae1e1427e4fffb3a23fe7eca136f0640 SHA-256: 6392456300eaae5ec463cd5359dfe8b47e2cc7cebbaf935e44c41cb24f72c8b6
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple links to potentially compromised websites and employs social engineering lures, specifically for payment redirection and browser extension installation. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the heuristics strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/97156090208.pdf In PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608285fb21c06---wisesexejeporuten.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93551083646.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/rugizenixenururone.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/reketabosuvezunotesox.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/sajagodiwivofiko.pdfIn PDF document text
    • http://photopuzzle.net/userData/board/file/2598925320.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/312a2350f148c0395b04eb14844f4af1/51263794644.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607802efef271---dafikajoxine.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/ledevakipediletira.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1de497dca8---76457196210.pdfIn PDF document text
    • http://stromzeleny.cz/file/6968006212.pdfIn PDF document text
    • http://btfa.tw/upload/files/58989706573.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/35568030470.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/48068215962.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/8j0cjoil4lljb8mjtunacn59v6/posod.pdfIn PDF document text
    • http://oskarmak.com/userfiles/file/95740242938.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/70862898756.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/wisofon.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/12388108876.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/85910575304.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/56labhj4tv4jjmthk1kad0v3h0/9862972416.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/92487325221.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=school+stationery+items+list+in+pdfPDF 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_off0001061e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061E 18336 bytes
SHA-256: 8d01570272269c571bcf626f9d6a93e5770fb3ae08130e89a3c802a50aa3e8f8
font_01_sfnt_off00013598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13598 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAF 11072 bytes
SHA-256: e174217a8cfd49df8b45bb3f420c6a8f1cc7a046f9272b1ae6ac3926946a0fd1