Malicious PDF — malware analysis report

Static analysis result for SHA-256 323537febf6851a9…

MALICIOUS

PDF

54.8 KB Created: 2021-05-26 20:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 245e9bb66765368847788c5e4ddc24c5 SHA-1: 9f6e71216ca7db33cef0ed53cde743870c4a7e68 SHA-256: 323537febf6851a9d3218c6b5a141b845c6a5837328959a3da392770c1987a28
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains numerous links to compromised WordPress sites, which in turn host other PDF files. This pattern suggests the document is part of a link farm designed to distribute malicious content or lead users to phishing pages. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7673

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://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1dde5508---gikelukewiboniva.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a175f661ff7---5624821872.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a301982d459---71898862639.pdf
    • https://bbpartner.cz/userfiles/file/zovukuxotinazuk.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/k6dviubj7sg0r6g21llr3jf4gv/98409407633.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/d40ab80b797891d09f1d6699e8d8fb04/65350838809.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608688445c94d---43258159204.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160821288ebbfb---8530769788.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a594cb24f0---zexodiwupa.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090803636a7e---poposuzenimovafetunibebew.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/dab3cb50476d001e11c8b22f38accfd5/98472380985.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098177a10c41---kigoxamoxevova.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845fa077f7e---45078266255.pdf
    • https://allmassage.net/upload/file/20210508174624.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0e1f4f5ba---93370635083.pdf
    • http://analogsys.com/uploaded/file/6177646060894ab5445e5.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=clinical+pathophysiology+made+ridiculously+simple+2nd+edition

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