Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca5f8a076d58bdcf…

MALICIOUS

PDF

38.0 KB Created: 2021-05-19 17:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 861013467925b1043793654dcbd4a86f SHA-1: 2bfef912e8049ed0164cc89686144be749f2e3a0 SHA-256: ca5f8a076d58bdcf938dbb5d14613fa0629ee25d811b6976c869eafa955f8843
174 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious content or downloads. The PDF's structure and content indicate it's designed to trick users into clicking these links, likely as part of a phishing campaign or to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6696

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 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.
  • 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.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607afb7068124---87232126212.pdf In PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/29eb52af97c8719efc10220e498a5ef8/70447767121.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/h2qjsjveujf86et4g2e0h4js3q/davadoziwatijiw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c24417443---82688961906.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/bba79880bf6d8f712c4478478711a127/43309836635.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaade941ef---59779796663.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/puguboduseripud.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/tebujanojumogoti.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/5656d8b77218269fea4499dccff1b2fe/dazaritab.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/9c3a9dd6a8d683ce4450304cd75294ad/wekipinugon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=chortau+dual+dash+cam+manualPDF link annotation

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