Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe1e3476eeb6e1c…

MALICIOUS

PDF

76.4 KB Created: 2021-09-07 14:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c38bec6e7ca45fc9b654763bccd4b2ee SHA-1: 0b5bf8202b4cc9050c72693c69699293f8a85959 SHA-256: 9fe1e3476eeb6e1cb910189b0d00f1a88ffe567d895d14bf0793daf3c82b1bd6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains a link farm pointing to numerous disposable hosting domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://garglob.ru/uplcv?utm_term=wps+pdf+to+word+converter+keygen PDF link annotation
    • http://lsneotek.com/ckupload/files/wunapo.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/6699711995.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/g1kjo2odc9t63umq119f8luq9m/59211189577.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/vidabazuwet.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/b4114d23a97529b8bcd6fdc30d8109dc/pawezo.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/zegokipit.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/32832704338.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/b59c703a9cd88e82b719964330669e0f/75403262020.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/53105822476.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087587e5c5f5---pipazoxoxosewexo.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109051728328918.pdfIn PDF document text
    • http://firegallery.ru/img/upload/tudijene.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/84334070632.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/ff473c96cd1f17b137e7b08ff1267a0f/51187596676.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f476be834c---danogerefaj.pdfIn PDF document text
    • http://adec-interiors.net/Uploads/file/kukowujiwuke.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075f6c43aeb5---fenin.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/d042c151d41a325c788b23825316ce6a/gakasidofikug.pdfIn PDF document text
    • http://bjallstar.com/upload/file/xugusipow.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a605794f16e---verevowuj.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/592631aa08cac7ba726bdbece48f49df/69786374074.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc4d6af3e25dd329e1c1bd3cd135ed2c/89044050200.pdfIn PDF document text
    • 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_off0000c711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC711 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF23 16980 bytes
SHA-256: 2b79ba217e16e5cf7640197fa40dfda824a54599bf94fb5e1072768cac33be98
font_02_sfnt_off00010af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF3 10848 bytes
SHA-256: 3beec1d7abc6d47eb1fadfb450786c42900ab8b37db10500b37f6a02bfac6fde

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