Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d2431a0bfc0f02…

MALICIOUS

PDF

68.1 KB Created: 2021-05-04 08:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04d64690c17d074615cb0173d99269b4 SHA-1: 0e07f6a9ec9942f33dad5e039ebad9e63b4bf1fe SHA-256: 12d2431a0bfc0f022ceec395c1bd013af9c3134096e00acab0f01e247cba3806
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to exploit users via external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8412

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://alshamiltrading.com/alshamilfiles/file/sanaw.pdf
    • http://jtour.vn/userfiles/file/57917356025.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/q43lovdhhr15onfk45qte8d9m4/rovapavire.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859c8736721---wasudimoki.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/nu5cjs49e9mi5lhafeghq7l4tf/5357892403.pdf
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710f855e1ac---69830584549.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607948faaa058---51667665241.pdf
    • http://jjmcp.jp/userfiles/Image/file/towumipasiwuzupagagosizi.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072604cf37c0---vapebudugojupi.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/6368fcd413ea253f44f2f8b259cb5862/pomenilegas.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608188511074a---33021869991.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/66db9b421e13a4aa0965b45bcfad2cb6/lofedowasexuveguduzewe.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/dcceam00rekkggd6pqsnp8ttmt/gamajilexoku.pdf
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/0f088305c6fd7fa07c10aa8a8aa5838a/janiwedisavijabipajirub.pdf
    • https://atlastoursntravels.com/userfiles/file/rasokosixivofafot.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/t6ue627nklb332t7r5j232mman/60122461304.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa6d1051fe---3333068022.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fa6295de6---zomuxopototevorep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=inspector+general+stellar+wind+report
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e016.bin
be8591b2052d396f174410928279833398b304c5afcb75041520c2efb38a4b96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE016 5056 bytes
font_01_sfnt_off0000f153.bin
202f7a7a370e6e0dd45de9aa3cd1b238ff13b246be97a265de2f5fe21dd36462		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF153 10368 bytes

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