Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b473742344e58a4…

MALICIOUS

PDF

95.8 KB Created: 2021-06-18 10:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9003d4a6a006c10b516589714244de00 SHA-1: bf3c935ec450cea0dcef0e06ea8b270cca2abdc2 SHA-256: 0b473742344e58a48e6680d97df3892e017142d331bc757ce578cc0816898a2f
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8593

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
  • 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
  • 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://mt-creativestudio.com/ckfinder/userfiles/files/27361170818.pdf In PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/ab52f8fb202c78e76a1a30945c41e48d/neluduz.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecdc9a1053---supelilamebazizavu.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/de2fad3c287f3d519c73da0bd94e9b4c/46009005091.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a22bee44fb2dfa0c9953b8c890337cb9/gosurepikibaket.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a517de14c---tigerojonanopixumaki.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b237677cc37---93565150840.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/54530703286.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/a25027b14d3fdf0af3511ec24270b68d/jekotuwes.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087135467167---28143998795.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/69639746736.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa60a3690d4---81189476423.pdfIn PDF document text
    • https://airbays.com/userfiles/file/lugumidefategisabogufel.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/91567535064.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/nabilupurakepufiz.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/371ef31e8855ef8a6c352bdd4990c48d/jakigigevi.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/zevedofevamuzakewira.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=falguni+pathak+chudi+mp3+songPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDE 5572 bytes
SHA-256: a59b2b1ff41908172a3b731c36b42d31b75416c2e4c4f2b64a57da2e6773634c
font_01_sfnt_off000140aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140AA 5124 bytes
SHA-256: 432146f997e0416dc0bcde176c8e0e98eea71998addfc599970469c6aed8ba26
font_02_sfnt_off00014f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F6E 12292 bytes
SHA-256: 8f4f2a4ceecf8fbc22f1d115030a159e9480412e6483c90a60feb45edf7072af

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