Malicious PDF — malware analysis report

Static analysis result for SHA-256 1923bd05b98da310…

MALICIOUS

PDF

37.6 KB Created: 2021-06-22 23:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e0733417d0c0a121c7fcc89d1bd3b7e5 SHA-1: 97f76a08340eed5f8a6119b12385ba39259b3050 SHA-256: 1923bd05b98da310b26b0f70496369d16442ae9f026ae4fe3a9ec2edb0b3d8d9
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 0.5302

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://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/99utb83vpgkhseprtotq4gnqra/21167024150.pdf In PDF document text
    • http://clairvoyantinfotech.com/demo/images/tewidisozawaposa.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c88c1f0a4---11277524415.pdfIn PDF document text
    • https://ekransamara.ru/files/75252550214.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/sajisumikadimisonez.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/miwaritixinaxapotazefilu.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/no22a3jaqehlgq2bddau6tu592/safuvabaxufon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=download+ford+owners+manualPDF link annotation

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