Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad3f0bd268b46bd…

MALICIOUS

PDF

63.7 KB Created: 2021-06-17 10:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5e6a880eef96dc2334e5365b16595355 SHA-1: 843158856d782cf3cb626e4fea8ba8ba6e281117 SHA-256: 9ad3f0bd268b46bdc25c91b0a8c856fea76b276342ffdd73bdaa38429e5d035d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links pointing to external websites, many of which appear to be hosted on compromised CMS platforms. The heuristic firings indicate a link farm strategy, likely intended to redirect users to malicious content or for SEO manipulation. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest malicious intent, possibly involving JavaScript execution or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8164

Heuristics 4

  • 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://pistant.ru/uplcv?utm_term=cutest+australian+shepherd+puppy PDF link annotation
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/p0fvt9bjtdrutl5467okut3ti6/22695217052.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/fou4810ro0fb0ndfqn68n21v68/76561794456.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ef97bc712---6781163529.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608a93a675399---xikipirutetexurulonofok.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/p11bu8o9otjumg0igdgu685e72/wawegapav.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/f06a79713cf19972b61cb5f0077fce28/mimemalenijizabipinupat.pdfIn PDF document text
    • http://actor-conseil.com/files/file/zomin.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/72370892666.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/d2e572aa2923172f3a50ebe124cbb432/66702633286.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a5c628890---20154800825.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1609989d759848---garaxelaborosemifenata.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/27379228155.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/3a9609d13bbb93087dbd3a0c12b751cc/zoned.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb820c6927---nakewedaw.pdfIn PDF document text

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