Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c8fa1f603d1802…

MALICIOUS

PDF

92.9 KB Created: 2021-09-04 01:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: aee27752176a80180a9b0c6e541d34b3 SHA-1: 49cded8807bbc8abd0743a620865deb219b45d1a SHA-256: 32c8fa1f603d1802bb89469692c5b119077062a019dc79a4ecc6ac1819692816
204 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware delivery attempt. The presence of embedded JavaScript and multiple external links, some pointing to compromised CMS uploads and link farms, suggests an attempt to redirect users to malicious sites or download further payloads. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document likely prompts the user to install a fake browser update or extension, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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.
  • 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://markzone.az/wp-content/plugins/super-forms/uploads/php/files/rv9n874n15a66vvcqb9cd6aet5/xotixibadalide.pdf In PDF document text
    • https://kisikana.hr/userfiles/file/76847505723.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/df335d15817bce723e632dbbca32fbd5/97808246384.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/a54b108d0e63b064c39d69b12d911aed/24888821927.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ce68dedfb52---zeluwebevuxalev.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/3165001341.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834a99cdfcd---31035025501.pdfIn PDF document text
    • http://onelove.cz/file/rarifufumovirawenikot.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/sokiniguxikunamuzurulaw.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/19901233805.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be4e32903ac---vazimebodizokajip.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/kotulitajutazobadaj.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff69b241a44---42222200852.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/buxegoxapevuzerasateveti.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/2fcd2f4e55cdd10e03365f3c221b85e3/wowafefonekig.pdfIn PDF document text
    • http://uco-kampen.com/media/files/rijovedimowidurolepiw.pdfIn PDF document text
    • http://www.retorika-zidar.si/ckfinder/ckeditor_uploaded_files/files/6813808679.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f3e3b38c3---75809418991.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b98d3a0a3---22557237060.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/59325271775.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160729652bfecb---63711020464.pdfIn PDF document text
    • https://kcss.hu/korosi/userfiles/file/18956457819.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/porenodagiweku.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/jabugimuximewinaguvizepez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=ccsp+book+pdf+free+downloadPDF 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_off00010704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10704 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F16 17560 bytes
SHA-256: 113a2d405c5c64647a04aea8aff003fb7a96c48834506f812802850fb465e184
font_02_sfnt_off00014ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE5 10772 bytes
SHA-256: 93cb9c18ab6f3e0a9903fee545dae4cc17497e53669b8d6300d58a3c5c180159

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