Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ec14e72503e3dc…

MALICIOUS

PDF

69.4 KB Created: 2021-09-21 04:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8f1804992c548e0dcbdb128ae0d7f47b SHA-1: 47d32a1ead70f928814d6332b60f4911989b7561 SHA-256: e8ec14e72503e3dc6a8181bd9d47542f99d90feb7f17aa80bde1f2dca6c15866
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a specific heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content, possibly for SEO poisoning or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7780

Heuristics 4

  • 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
  • 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://mesterteto.hu/userfiles/file/62305395536.pdf In PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/17797611815.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/19950184658.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6300177085.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109101644488239.pdfIn PDF document text
    • https://mountmoriahcamp.com/media/xuraxugiz.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161334fc46a1aa---xotiditawumijalabuxat.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/kesikopuzavosiloril.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/60674512767.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/vefodenetonowevufizuvom.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/ridov.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/37760215342.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/89534745856.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/roriwokidogesebe.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/79306279820.pdfIn PDF document text
    • http://adhunikjewellers.com/ckfinder/userfiles/files/22231814428.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/palatebuwe.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/cecb3416f1b3ecb2685cafa620ec7a24/rofavimovumefer.pdfIn PDF document text
    • https://rjpexport.com/files/ravawodekupug.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/xomuniputelajujolag.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/girarunoviropexireju.pdfIn PDF document text
    • http://nbc.com.vn/ckfinder/userfiles/files/68183904216.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=monster+game+booster+200+pro+apk+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA06 11196 bytes
SHA-256: 1232973fb38eb03323e75945039469179ac16c962cd0e2b112e69487d01c4a29

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