Malicious PDF — malware analysis report

Static analysis result for SHA-256 4adcd6ae9e6ec6e5…

MALICIOUS

PDF

37.6 KB Created: 2021-09-08 05:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7110e770e91d10f8f714fc8f20535a51 SHA-1: 34967020923be847a5e0cddb5232acbb6acf56fc SHA-256: 4adcd6ae9e6ec6e5df5b5de5cfcc2fe7095610ce10258f3637b563e809e4572a
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure with a single image and a clickable action. Multiple URLs point to compromised WordPress upload directories and other external sites, suggesting the document is designed to redirect users to malicious content or download further payloads. No scripts were extracted, but the PDF structure and URL patterns strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9643

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://irlanc.ru/uplcv?utm_term=lorem+ipsum+pdf+test PDF link annotation
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/68a880e62cfa9a450fb675b3052b2bf7/dodibenakub.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/20870304666.pdfIn PDF document text
    • https://biocoils.com/img/file/19566193784.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/657094lli067d9apthl2r1um8f/jexewob.pdfIn PDF document text
    • http://prestopc.it/upload/file/25872616460.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/pujue8pnssrr9ni48rf1599dj2/boxoneta.pdfIn PDF document text
    • http://drprdesaihospital.com/uploads/60613114009.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/ktqjahl10fcdk0b7lmjheevut3/vemusakop.pdfIn PDF document text
    • http://brukbet.com/user_images/file/suxolefadumupobanip.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-foIn PDF document text

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