Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c166194dc67191…

MALICIOUS

PDF

80.8 KB Created: 2021-06-05 03:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3b2d3c3dc3d2a1360c1d8b4138f91828 SHA-1: d053fa56b3b6df83d25ae106996a344329f7ccf2 SHA-256: f3c166194dc67191671aa18bd9116108736d6b2682bce1dc27a5bc62d4e31906
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to compromised websites, likely serving as a link farm for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'PS2 motorcycle racing games list', suggesting a lure to attract victims. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://huntic.ru/uplcv?utm_term=ps2+motorcycle+racing+games+list PDF link annotation
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/dc1e6b4f473ddcc2b6231e4bb6651916/13937806775.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/78992046817.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1debc4743d---nigutawal.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/luvevarilikub.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/6e2364ecc967ccf410d87df7cbebcd9c/71811440884.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/35159889932.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/c624b1a0f12a842940ffa83f41fcbe7a/webapadujurenidalefasidu.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079751272058---wumudoza.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/cnrg6uuvs12nq053p164bjras7/zisimetolojoforugofok.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/52145757822.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/dajudurodipir.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/65158476453.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/88223589662.pdfIn PDF document text
    • http://www.asslar.de/downloads/xomulutegizu.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/daf770b2d8d065dc1011be567d71f7ac/28928532149.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/54779753318.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB4 5352 bytes
SHA-256: 4d32464a48409490c41241629251d4c492dec677f584ff77b535ecb7af01939f
font_01_sfnt_off00010de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE2 11460 bytes
SHA-256: 0fb2875ff73d77c4a28b0afb06e3bfcb0f3d4766e5203315c3fe359a3ab282e9

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