Malicious PDF — malware analysis report

Static analysis result for SHA-256 620d7ce820c65df4…

MALICIOUS

PDF

63.6 KB Created: 2021-06-25 03:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 215f465aca08577dc4cb282606b03218 SHA-1: f116b17999a871029541ca334521ca23a2762ce9 SHA-256: 620d7ce820c65df4008b94ec9d77b22335244b28ccde2be6ce1a9f566012125e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9641

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.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9afa197cfe---46515512851.pdf In PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/7gab29ql8udh11p7s9632e6bf5/18254921719.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c31c71549---13619768860.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bce0a249e22---xodejidumetiwipugawa.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7d9a86ed9---55013146575.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/kagotajegezarepejisor.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/52496636893.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/difuxijaxevozaj.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/561584b1f09895f386175a8e8261e022/1718773103.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/88250561014.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80e9c6e2bc---73923624205.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/42790367767.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19b2c71782---balosax.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/80de7b6fc3273e2dd7e760ee62e85708/jekozosarisitimuf.pdfIn PDF document text
    • https://songhong.info/userfiles/file/78528530409.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/20174638666.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/a3ddf1dcebc5dd67445a08bbfcbc5db2/72659428446.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/ec2b41d05f9c4b9094b6a1f41dd127b3/bogasapuz.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/kovunanafomaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=kvs+registration+form+2021PDF link annotation

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