Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2224f75c883d7e…

MALICIOUS

PDF

69.6 KB Created: 2021-09-25 10:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: da5c418cae23262f5d5660988f9d33af SHA-1: 8b3b69ffc2b1ea8b3b083eaf2ac8c8db64036a6e SHA-256: 9c2224f75c883d7e85fe195985598ff4d7ce022e51dfac450390f21c83d03766
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 disposable domains, characteristic of a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution lure.

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://coretry.ru/uplcv?utm_term=friends+watch+online+123 PDF link annotation
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/bivopapetuvalif.pdfIn PDF document text
    • http://jump360.co/upload/files/20210920055443.pdfIn PDF document text
    • https://hotelite.in/userfiles/file/foroba.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/42759742580.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/83204208246.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210923075837.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/98749767626.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/nakozedojazumumutov.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/cnsupeeus4v04trlr7mummmqag/99341750232.pdfIn PDF document text
    • http://gongin.humenia.com/upload/userfiles/2021/09/files/210911013658.pdfIn PDF document text
    • https://jackinthegym.com/uploads/files/202109082001475281.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/resotekiwufuveruvegav.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/puputagagaba.pdfIn PDF document text
    • http://ipublicity.cz/data/file/zobupixutad.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/76433090743.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69573663973.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/18904090222.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210907_26A711FB80987A70.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/73911343052.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/161344fd22bfba---10652781086.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/mafusifo.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_off0000ae04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61B 10872 bytes
SHA-256: b5ca5f649ea6853b0ecd99820e5ff043ff8eb02cdf686be39d62c5ce0476fa6e
font_02_sfnt_off0000df51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF51 16516 bytes
SHA-256: 187e18189238827846553e98a912a65382f13b2d67852ef835c5e81863fbd07d

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