Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e9a89c42ebde9b…

MALICIOUS

PDF

87.1 KB Created: 2021-08-18 19:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1b0d97b5f7ac138499bc28d416806a8c SHA-1: bb38684644f4cd3ac273706222b04f544a6c49be SHA-256: 69e9a89c42ebde9b8bfce1355b269139310368c4916d4cfb9b7bc18faee247c1
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://bernardthevenet.fr/ckfinder/userfiles/files/27261063286.pdf In PDF document text
    • http://fpsh1980.com/clients/7/7d/7de5299bd6bdc19cdd6b275c058e9c4a/File/gejujurojiwa.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d330cc5c04---xogerujefimufesodafezuzi.pdfIn PDF document text
    • https://schmitz.cz/res/file/nobiwor.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/sexejazojapejuweneli.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/38345633554.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/f0f3ea9258d2bdca09d97af5bff92c6e/demufijasikiworapad.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085fcb943b00---ralimof.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/daj0mq61v85g3rmvkmqdfmjp33/rimebe.pdfIn PDF document text
    • http://fluorescent-training.com/file/sipabitutez.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e40384557a---lubenodenovibugosisugo.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc94aa035a---viluxelipin.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/51472733534.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610401dcccbd2---pepanabatoru.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/rgtudfldakc8070huqtpds7mj4/61494769057.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/bareligonede.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/kababobanidadedigew.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/14516240087.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/nfk4o8kti897l20mlenrt9nl8v/loxaxusuninasujepumibu.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/jalewikonomaxikunamasaza.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/s211kgnksho0fveb4pqt0e1d6d/namivitulilod.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/daxumotoba.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cef907aa5c---jukinovok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=holt+mcdougal+geometry+workbook+answers+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_off0000ecf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF4 11396 bytes
SHA-256: eb359ddb9ef95c76bc1652797d1234e567e3e04305001f3326f7f11d5cea6558
font_01_sfnt_off00010779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10779 17204 bytes
SHA-256: 416daa3b3e793b632f0ae240855be6adbc924857fb68879d052e22cb0e39fe63
font_02_sfnt_off00013418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13418 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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