Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e4660328109ee0…

MALICIOUS

PDF

90.5 KB Created: 2021-06-26 16:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7f5e7adafd3a2c4147ecdf347a4011ab SHA-1: eb9915f05915b1a2e03bd290700e33ae7c491685 SHA-256: 09e4660328109ee0f826808418bc2a2b94c445d3316a5d6a441d8a30b2413271
204 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The presence of embedded JavaScript and numerous links to external PDF files hosted on compromised WordPress sites suggests an attempt to redirect users to malicious content or exploit kits. The heuristic 'SE_BROWSER_INSTALL_LURE' strongly indicates a social engineering attempt to trick the user into installing unwanted software or browser extensions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083666811b1d---30989122225.pdf In PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a96b1683c6f---pokefixewutovukikeligev.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/k2btm3uoicttaao0tfsljdf4eg/94683960786.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608567b392a5b---72751464909.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/xufidurusisijipetaz.pdfIn PDF document text
    • http://vicorsupply.com/uploads/images//files/55697511021.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/id0el21nqh339auuf7e13i044o/7915142256.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-3/20210503010611271118.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/t5gjuk5ql0imjmju6lgan6naf6/jawad.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4145a1e44---24525175623.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607035d38cd02---vadebomago.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/c1a5f4d5c6c15fa4f51c60289f9d734d/23356969791.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/78f8606313bf2a3ddc88b35057f3238e/bozosawofola.pdfIn PDF document text
    • https://faceless.me/userfiles/files/zetudiguwa.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714049470ce---63739866642.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac50e5665e2---79181257866.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/vetosuvarodafeforugive.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608701e76234d---21206380999.pdfIn PDF document text
    • http://marymo.ru/uploads/files/virunokegufiwef.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/xigakigedukunowubavawijep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+hack+pubg+mobile+for+ucPDF 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_off0000fe2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 17324 bytes
SHA-256: 28d77d0f91753df29e9c6dcd03f6ab66b8ce246502fbb47537208bb3db3e0142
font_01_sfnt_off00012b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B77 11064 bytes
SHA-256: 78302dbd8c28aeb73887df99c38829883ffb038bed7c4dfa4dffdf47bde895b4
font_02_sfnt_off00014512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14512 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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