Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d0fee2d67b2369…

MALICIOUS

PDF

81.8 KB Created: 2021-09-21 09:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 18e034f2fd9c9aa5c9fb5278c2d1c493 SHA-1: af0162ce04250e8c10a629e868cf287c8c42d9d5 SHA-256: e9d0fee2d67b2369f81526909101e714eda03e06b8fe00dccf5e3d199ad09b8f
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish for information. The presence of a 'download button' heuristic further supports a deceptive user interaction pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://medvor.ru/uplcv?utm_term=pvz+heroes+mod+gems PDF link annotation
    • http://jinanxintiandi.com/userfiles/files/kanajalabarurasivajone.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/39409917815.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/jajutuxixibo.pdfIn PDF document text
    • http://jfe.hk/userfiles/roguzo.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/lajofojogupafitajojo.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/danoro.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/9009603658.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7d54f29b3---68564387111.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/pekemewepozadize.pdfIn PDF document text
    • http://getem.eu/files/file/xexadewujukurakezejufidur.pdfIn PDF document text
    • http://romento.com/uploaded_files/userfiles/files/13822067947.pdfIn PDF document text
    • https://seerupit.dk/assens/file/94339012319.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/62381136986.pdfIn PDF document text
    • https://limberhurstgallery.com/imageuploads/file/pefuzofutudejebun.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/29719618054.pdfIn PDF document text
    • https://intrastorg.com/userfiles/file/91385312040.pdfIn PDF document text
    • http://paradoxine.com/upload/files/wulotagubizabikajewa.pdfIn PDF document text
    • https://bonaparte.cappencms.com/templates/files/16780041457.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161466d8753a4b---tunaxilomit.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/jozuvetebefemalafeko.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/vebuxerewe.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/bbfa5e6419aee9646c7bd62e0257d4b8/fotalebo.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/45197460068.pdfIn PDF document text
    • http://eva.am/files/e2abc7db759612c9.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_off0000db8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8D 10320 bytes
SHA-256: 38f57310a6f6848e996395b87ae16e8a22c08bedea0d5dff430d6a70ac7059ee
font_01_sfnt_off0000f2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABF 18168 bytes
SHA-256: c35a19a4118ff0f4a972736f6763c16ece7e3b1b14dcd702791f57a29a1db11f

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