Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce88845b7df6b070…

MALICIOUS

PDF

63.6 KB Created: 2021-09-16 09:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 289f6d083c9259a52b28e4a5328ed951 SHA-1: 30ad80d7e73cb2e9457fb0a106efd152ee5e6db8 SHA-256: ce88845b7df6b070f62efda91dd7784dc6a4a6206270f993d5eba35d574cd9d5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a critical heuristic firing for PDF_SEO_DISPOSABLE_LINK_FARM, indicating it's a link farm on disposable hosting. The embedded JavaScript stream and numerous external URIs suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution. The document body is unreadable binary data, providing no further context.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4801

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=gazi+tv+online PDF link annotation
    • http://thecountryclub32055.com/userimages/mugewetudegisusatukexe.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/81123113394.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/90078112213.pdfIn PDF document text
    • https://mklaassen.nl/images/file/11262463867.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/12054619794.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/84229173399.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/69576049983.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/82492468577.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/rulonupizonuxi.pdfIn PDF document text
    • http://larben.cz/media/images/upload/file/355422309.pdfIn PDF document text
    • http://espressobuilders.com/app/webroot/files/userfiles/files/97597036218.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/86661013419.pdfIn PDF document text
    • https://dukupahit.com/contents/files/48467788440.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/84403166557.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/62478581275.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/kebonozejaguvanuro.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/xigakawidof.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/17292768730.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613648041cfd2---35664070369.pdfIn PDF document text
    • http://auto-rad.pl/userfiles/file/godekiminetilonaxixanox.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/xapifojitotiviwazulanedo.pdfIn PDF document text
    • http://unibeauty.com.br/ckfinder/userfiles/files/57497935140.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/25466974111.pdfIn PDF document text
    • http://cluster006.ovh.net/~greeters/namur/ckfinder/userfiles/files/45414748595.pdfIn PDF document text

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