Malicious PDF — malware analysis report

Static analysis result for SHA-256 64083683ef10d6ca…

MALICIOUS

PDF

140.6 KB Created: 2021-06-23 19:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c004d7c6e26e53ca076fd267dc2c41e4 SHA-1: 32f8517b9f4e9051f91161dbbb9d9e617db17c10 SHA-256: 64083683ef10d6cacbd47d047f36e26f2e041c64040bfb8993cb91795d8a45de
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains links to compromised WordPress upload storage. The embedded URLs suggest an attempt to redirect users to malicious PDF files hosted on these compromised sites. While no scripts were explicitly extracted, the nature of the links and the PDF format suggest potential for exploiting PDF vulnerabilities or embedding malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5374

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a885c411e8d---46769589238.pdf In PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d077b628200---vepatisumopofomolotep.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b574782bd40---debetewi.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/56113164556.pdfIn PDF document text
    • http://innotack.com/userfiles/files/rikuxatogotad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=charles+spurgeon+sermons+pdfPDF link annotation

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