Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0d896c22d65d75…

MALICIOUS

PDF

68.0 KB Created: 2021-09-24 13:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fc5805dc13a69cd0bc023ac53b79a106 SHA-1: 7ec2e6877086bd02f7c6fb900da1c50c0c9774f8 SHA-256: 1e0d896c22d65d75b452ca3a3482203816fc01fedd1489a42d208d59bd71c876
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which are likely part of a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=ebook+pdf+gratis PDF link annotation
    • https://ukmalayalamnews.com/userfiles/file/vifaloxu.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/47266503507.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/62437397035.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/vuxovemeropebatikelari.pdfIn PDF document text
    • http://samajsutra.com/userfiles/files/rifajove.pdfIn PDF document text
    • http://pharmabiosolutions.com/filespath/files/20210924161053.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/161447bdebc946---13081158082.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/lunevilikak.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/45814433904.pdfIn PDF document text
    • http://bippex.com/filespath/files/20210924073000.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/27732661321.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/mezoxiv.pdfIn PDF document text
    • http://xn--elementy-zczne-kwb98g.pl/media/file/kefudut.pdfIn PDF document text
    • http://ryukatsu.com/userData/board/file/71392097356.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/marulizoxakimilofanisa.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/nutolidakijirowogoniva.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16144a02819819---54759416926.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jawiv.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/tipubumixawab.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/5454945854.pdfIn PDF document text
    • http://phanmemerp.vn/attachment/files/paxijakiroruzosi.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_off0000aaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAEB 15728 bytes
SHA-256: e4b1952f2793255542436b2f9557e10d91f58f4088e6080a3e8db0f0e2444e90
font_01_sfnt_off0000d33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33C 10604 bytes
SHA-256: 3dc6784d5da1848057ddc1848bc9894f92150c516ec97a1d9b53515725c8d2a8
font_02_sfnt_off0000eb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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