Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa3bef816b6aacf…

MALICIOUS

PDF

37.4 KB Created: 2021-09-16 21:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cbfb4c651c00e93c603ce1f179587dc4 SHA-1: 7b3ab686a5d4125b6bd88c7147f761f263ac30aa SHA-256: daa3bef816b6aacfd49bf354d2c568ace51666df79b6639ecfceed931702b0ad
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is designed as a phishing lure, presenting a screenshot to entice users to click a link. The link directs to a compromised WordPress site, which hosts the malicious PDF. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to deliver a trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6667

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://jinwoosmc.com/userfiles/file/83173145787.pdf In PDF document text
    • https://akconta.com/uploads/files/72401475684.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613997f71a33e---2118568141.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/37373832968.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/71635486162.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138537ecab55---85993058072.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614389797abec---pizazojijoniseg.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109130238207164.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=cod+modern+warfare+4+free+downloadPDF link annotation

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