Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b778faebd534ff…

MALICIOUS

PDF

37.9 KB Created: 2021-06-16 03:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 19ec5441d5c6e08c8ebddc20b18b6477 SHA-1: 59f0e1aeae733a0eaba9dc3ee33ee4efc9e152e6 SHA-256: f6b778faebd534ffc486348a809df9874c925e80baedec9a5a4d022415b59a1a
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, indicated by its small size and the presence of an image-based design with a clickable action. Multiple URLs were extracted, many pointing to compromised WordPress upload directories, suggesting a distribution mechanism for malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a dropper or redirector to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5135

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://pistant.ru/uplcv?utm_term=bodyboss+tone+pdf+download PDF link annotation
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcb9109869---pasavuloroj.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a227ffca798---wofidizepuderisev.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/fikoxutamerubanivusa.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608740027a789---gegamubukerimuke.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f18323db1c---2262557957.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fb7747219---xedazobi.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/25868647591.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91b20dcdfIn PDF document text

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