Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f56f21e05173bf…

MALICIOUS

PDF

37.4 KB Created: 2021-06-06 04:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f7e0cd99ae402f9d4a6e1c3f56d3ced1 SHA-1: 8305a291bab1d6d7b2384aaa3b3acb175187bd65 SHA-256: c2f56f21e05173bfe6ba3dc8d1bf6c48011c2cf2e590551c154b29bdc69dd0b3
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-heavy nature and a clickable action. It contains multiple links, several of which point to compromised WordPress sites, suggesting a link farm used to distribute malicious content. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5974

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://pixomot.ru/uplcv?utm_term=how+to+get+hypixel+skyblock+on+minecraft+pe PDF link annotation
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/d4093683e853cc3657e45b13c1bf00a7/gubegojukojufugafesagutuf.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/abd0cjq838k3a2malak90cu501/43956386548.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/vivekusivu.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160829fdc9094b---75892161570.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/ab270bf923fc6fc3149fe13a5e290422/wenonelidufewibu.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903641ec40e---76503754871.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/36570257218In PDF document text

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