Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdafa552db7536f5…

MALICIOUS

PDF

62.3 KB Created: 2021-09-04 15:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6dcbf7e10ee31c65a7d99bfd3ffd4d5c SHA-1: 00853e629146888091ae2f783cc8edeb6df4f30b SHA-256: cdafa552db7536f5d2e5497df3a1390051bab0132910b57d58165b0f0eda21f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics suggests the document is part of a link farm designed to distribute malicious files, potentially disguised as legitimate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5897

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16072a97bba573---4031463396.pdf In PDF document text
    • https://angkorphotographyguide.com/userfiles/file/kuxenuxisitubodilin.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/2958886281.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/suzobujajosod.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7843936c57---54044276128.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f67fa2404488fc2d70c6db43b87c39b/68256290931.pdfIn PDF document text
    • http://artospace.com/pics/file/25404123146.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fb432d6fd---kivuvigezimesobos.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/zuvukipuludoj.pdfIn PDF document text
    • http://mvpvo.ru/userfiles/file/voverejod.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/70586333643.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/8b1486dc963322e808dce8f91e9ebf76/40220453726.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/kejob.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/16145373473.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/mimosilevifilonetegus.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/webaboboxenevokid.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d519b9a7a56---rebibabuvuzojojupova.pdfIn PDF document text
    • http://radis-rrl.ru/userfiles/image/16522900005.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/079fbd9040f5e741dfdff1501fa90a83/52738992248.pdfIn PDF document text
    • http://redactron.com/userfiles/file/wetanemuberamogavoloweza.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/konuziw.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09b9c5797a---27875655743.pdfIn PDF document text
    • http://boxethai38.com/upload/file/tezeses.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=head+first+java+pdf+2nd+edition+free+downloadPDF link annotation

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