Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b9048577623429…

MALICIOUS

PDF

38.2 KB Created: 2021-06-06 01:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6014034787538fef18ff5357e49e7b25 SHA-1: c3b03e8387f8ef2493776248f60a1afba5115652 SHA-256: 15b9048577623429ec053cb8d85bcd3a80521c7091cd7ce69e87cf19986913c8
144 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 and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5195

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://crysiq.ru/uplcv?utm_term=what+is+knowledge+gap+theory+known+as PDF link annotation
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/8694b16b0bd138047d88178de9109977/93672240652.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/699d29bd338ac58894fb3152c9f2c9fc/81280529580.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a92cfec944---37408304397.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1608710e339a47---regisebonodakezutef.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609109872cbd3---daxomigeperibobugowuni.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/zujiputopaguboj.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/120015215206.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/844d3097a63d1de1720f43aaa0e7ef1a/jutogawokeritegitixeruki.pdfIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

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