Malicious PDF — malware analysis report

Static analysis result for SHA-256 7114a47c8e017289…

MALICIOUS

PDF

79.9 KB Created: 2021-09-17 08:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f8ea836445603eb4c867851303a644de SHA-1: 7e9fad449564d43329eb02129e1df9d7553b120d SHA-256: 7114a47c8e01728928fd1fc194abb7fa51d65a17c6ebd2ee28a1b563d620115f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing users to multiple external URLs, with several hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://foodthings.us/userfiles/file/zinirategibajoz.pdf In PDF document text
    • https://lomasdelaweb.com/userfiles/2008.09/file/zepolimaguxomimikavexaxe.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b928f66010---guxosagufuxitozejo.pdfIn PDF document text
    • http://cyuansheng.com/userfiles/file/rezunawukusobu.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/52662546507.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/28890545038.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/96172744895.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139bbae340e7---rogejizibelanekowov.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/donigoramimanogofuvil.pdfIn PDF document text
    • http://ipoz.pl/userfiles/file/35588343038.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/50565435989.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/pokakefedagetanuroli.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/31041325503.pdfIn PDF document text
    • http://eternaseguros.net/files/files/5667367046.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/sesemidagokeserur.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/774426897.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/pedovugegivabita.pdfIn PDF document text
    • http://synphabase.ch/upload/file/33603628124.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366f3cb285f---97205050169.pdfIn PDF document text
    • http://icbiz.ru/userfiles/file/xufufurun.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/kepuxasoxo.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/kijopojuj.pdfIn PDF document text
    • http://yurisolomko.com/userfiles/file/86305581820.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/85555814973.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/tpq1k6eepf4iavi2u3bllbuqq1/85702361797.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=java+jbed+androidPDF link annotation
    • 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_off0000d4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A5 10256 bytes
SHA-256: e90d0b0a618747ea13cba52bc9b8182d576e1c0965567a17a2499ac86e8ae7c4
font_01_sfnt_off0000ebb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB4 17872 bytes
SHA-256: 579d8a64343145a4faf424a06743784848df69ee1dc880be334440a3bbe8d78b
font_02_sfnt_off00011a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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