Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab6ee1f97be4004…

MALICIOUS

PDF

79.9 KB Created: 2021-09-01 19:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e505aac024ac39168aea9c7df8754694 SHA-1: 7c50a8943968a351210c97498a6699755368081d SHA-256: bab6ee1f97be400480e0a3a0337923b1cba483c64ea7a23bbf880983d8cf21f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress sites, likely intended to trick users into downloading malicious files. No scripts were extracted, but the presence of numerous external links suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7f61896c6---80948762729.pdf In PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073198a00b9f---luzumaminojodowedatidaba.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/4cbbef309279e184415c6114f526ee40/67365395233.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f1964c674---91179465060.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/6dab05d72e7bc5b41d082e78aa1a4e7d/3884570551.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612040ebbcf77---27349101485.pdfIn PDF document text
    • https://limsurdua.com/contents//files/83681226262.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/bozapiledeseponowizaj.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609db69de646f---48338157713.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/23600200626.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/kegipimojinelitajolimowu.pdfIn PDF document text
    • http://huonglonghotel.com/uploads/image/files/67727496685.pdfIn PDF document text
    • https://diamond-marketing.cz/soubory/57002650980.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/dadujuwonu.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/86e102036eb52175c938daccc23d943c/vibewowo.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/isminij750ioa75i7hcjr4000n/palirejotomik.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/getel.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/vibeluxadukogaxokazibajir.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/80456826219.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/23089728490.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5f9bc6af2---tojekasojar.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a568aa478b2---tigefimupelet.pdfIn PDF document text
    • http://jeanchapleau.com/userfiles/file/49238969524.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=excel+sheet+examplePDF 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_off0000d687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD687 10308 bytes
SHA-256: 8ce1b6b9a450883f54f19ac61607c3177c05cadd87cdd50b86235892a373579f
font_01_sfnt_off0000edd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD1 17320 bytes
SHA-256: b8f3705f81b94330a6f710dfad7b899196e5417a6a228193e90c012e7c1bd13e
font_02_sfnt_off00011a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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