Malicious PDF — malware analysis report

Static analysis result for SHA-256 feec92fed001f7af…

MALICIOUS

PDF

63.6 KB Created: 2021-08-11 08:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0fd54f8c43c98249ca7464d12cbb5d51 SHA-1: 7623c1ff9d693927704b89103bdfa138080837f6 SHA-256: feec92fed001f7afcd0a109abcb50b8629a562b16656cb2b8e7351ab0d3f0696
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload storage or disposable hosting, indicating a link farm designed for malicious purposes. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of these links and the detection results strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9184

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://nomylo.ru/uplcv?utm_term=how+do+you+write+a+proof+of+concept+example PDF link annotation
    • https://holocaustresearch.pl/nowy/photo/file/67037369401.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/xabazizarivexelaxubig.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/vazut.pdfIn PDF document text
    • http://digifast.cz/userfiles/49499768572.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210717_94AC5E523E7EE8D2.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e38be7b0da4---zulesemes.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/ligafejafalimivigunugizem.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce85327275---13536688692.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/6fa43a63de298ad3e6caa5f12a99aaff/vojovifimawajiwudetan.pdfIn PDF document text
    • http://farashimirooz.com/files/bexenu.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/ovhpqlm8cfu03k65cpcl4jpusd/zukibexapikinafa.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/busuxijedowir.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611169733fe93---20391503682.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da1d495c82---jofozig.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a02caf06725---biritotawimogilavu.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/e89b7224798a36896319c5ed8a25f80c/90406630356.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160796eee529c9---96163839384.pdfIn PDF document text
    • http://markone-tools.com/upload/files/ruxapefisaxolewufo.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd932a636f---4198286253.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/fedisomubobipaxemi.pdfIn PDF document text
    • http://ombs.ru/uploads/files/saludakobul.pdfIn PDF document text
    • https://unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/galivisodot.pdfIn PDF document text

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