Malicious PDF — malware analysis report

Static analysis result for SHA-256 295e8b43e62c9197…

MALICIOUS

PDF

89.4 KB Created: 2021-09-16 15:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 38ec0065890d1a950a87407d86e48b95 SHA-1: e169fa6cdc33bc67af7045931843b85164e8f7e9 SHA-256: 295e8b43e62c9197ed292f60065f6034204381025630f2b7777e838feab59de0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The file also exhibits characteristics of a link farm, with a high density of external URLs pointing to potentially malicious or phishing sites. ClamAV detection and ML classification strongly indicate malicious intent, likely to lure users to compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=v+bucks+free+no+human+verification PDF link annotation
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/33639176131.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/62952946614.pdfIn PDF document text
    • https://fundacjaartfreeart.pl/userfiles/file/nijefukiva.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/jipizerup.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/luzuwofuzepedosur.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/49472543055.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/53678261003.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/2bee896d8d7de4583e1fe65b39d4125b/fazebede.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/82155984787.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/wodamus.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/riden.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/88128885640.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/42544382067.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131e234b1f90---76757734730.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/vidixu.pdfIn PDF document text
    • http://prestopc.it/upload/file/kewisinakij.pdfIn PDF document text
    • http://yilip.net/userData/board/file/92235754081.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/pozomawanalepiginufamowi.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/vemalanunupivezabowag.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/bimakuvojix.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_off0000f49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB3 10920 bytes
SHA-256: ced0cf709d0d0edfb0b585d74e137106011975e12f9903f74b26503b089ea44e
font_02_sfnt_off000125e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E5 19236 bytes
SHA-256: 6c2a335ed582124c25b575d527fb5f0838c01e837d814beebcf2fab45ea4f8c7

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