Malicious PDF — malware analysis report

Static analysis result for SHA-256 25003cd3d6204542…

MALICIOUS

PDF

38.7 KB Created: 2021-09-08 01:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 24fff1753753a81dc9679716550d694e SHA-1: ed1ede52b65919ee5984747c4de14fa0127d4901 SHA-256: 25003cd3d62045429d71d8a1fab63d0ce705ca61f91a9b7a72bd071dce00df43
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF exhibits characteristics of a phishing lure, including a small file size and a high density of external links pointing to compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded links suggest a multi-stage attack where users are directed to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8504

Heuristics 6

  • 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 38 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.
  • 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://daindnc.com/fckeditor/userfiles/file/71474499557.pdf In PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b42e6630d---76148509958.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5008565a8ebca243070e01686881acca/zafogifuwupuxazetuke.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83ff45f3a---lemamidosukeparuveduvimo.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/76568011294.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af705c9f3dd---86315718376.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c154801283d---bigorejopupofojorap.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/dukebedosobap.pdfIn PDF document text
    • https://sgotomotiv.org/upload/files/jurevobefabovusorana.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/43840560323.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/33379938871.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075eba37001c---juxexife.pdfIn PDF document text
    • http://winso.tw/userfiles/file/56926509336.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/nemuoesehc1vr14nrk5846n90r/3284587245.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=bangsamoro+organic+law+tagalog+pdfPDF link annotation

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