Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbea5c4e6c697bd7…

MALICIOUS

PDF

37.2 KB Created: 2021-06-19 13:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: fec3d0a7f8d8f003092c65a4c7357f59 SHA-1: 79663f45fdfbb028de64338e43520ea3454225d9 SHA-256: dbea5c4e6c697bd75e47aaa5c2a3d204d07e2b5aeceec8fb0c953bdbd412c36e
144 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable link. The link directs to a compromised WordPress site, which hosts another PDF. This suggests a multi-stage phishing attack where the initial PDF acts as a gateway to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5922

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 37 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://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/pn38n79c5aqtr22skibamq37hh/25626955216.pdf In PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/e156aa3f9b80752b9e19f971253b5d34/27689629644.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a58814ca9---gejokubipotafigazere.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/vd7t38d3e8a4fv80rs79ogcr2t/29281720528.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b35e031f6f7---lanakuworovovudibokajuno.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/47928745775.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/393dd12da713852cc8f14ffe57478925/35710834060.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=turn+mixed+fraction+into+improper+fractionPDF link annotation

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