Malicious PDF — malware analysis report

Static analysis result for SHA-256 d023ab9dc2d16fd3…

MALICIOUS

PDF

70.1 KB Created: 2021-09-28 18:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: cada35d79fc6b56ab15ba78206278f03 SHA-1: 06942e468319c521eeb30d919fbb89f5b28b956b SHA-256: d023ab9dc2d16fd3f0e310b0029b2422b1ddf78718302e929ff8f61b75466354
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://chcial.ru/uplcv?utm_term=define+widget+android PDF link annotation
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/esk2k52ardt14jtvermkiqtkd7/99150322399.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/36233830497.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/57634273125.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/99546770842.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/xuxotoguguwanulegirezub.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/72822927667.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/43927562811.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/nowusonebawilakeke.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/fowobomipejamilezu.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210909200941.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377b50a864b---jekavubefag.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/13190542533.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/85328520022.pdfIn PDF document text
    • https://vilnius.cvzona.lt/resources/img/files/75085002424.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210928_3E0BE13714A18C67.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/kirodijomuzol.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/87099738812.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/28795858795.pdfIn PDF document text
    • https://umartravel.com/files/juter.pdfIn PDF document text
    • https://tdfstore.it/file/42023018025.pdfIn PDF document text
    • http://xn----0tbbbfo0f.xn--p1ai/userfiles/file/jirowadupiwukewojemir.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/taliderulu.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/gowonezeradovojosilu.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/xirufe.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_off0000afb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C7 16996 bytes
SHA-256: fe0a2f8416ba1c5701dad3bb9d91551b52f717a99e768d62aa5a792fa44ec9f7
font_02_sfnt_off0000f28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28C 10404 bytes
SHA-256: f6eb852d9c61d35f4610b092cf03bf779f279acd873173f3299d937501d10e7d

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