Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2550f12e5a4506…

MALICIOUS

PDF

73.5 KB Created: 2021-05-15 02:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 689848ec9c34e76f91f7ce01c5b4e09a SHA-1: 1de1efa2bb2f2d298eaab51a599d6cd5c107443c SHA-256: 3a2550f12e5a4506b088dd7f3804eebe4e0586e357ada758912c9e58a917414e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8267

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 http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/2gmn8tiv8cq5d1oblcqdr0ml23/94414078649.pdf
    • http://coffee33.ru/archive/file/57537892702.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160809a996e930---88105879182.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608887ad838a6---46232022351.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef8b6304cd---58223170505.pdf
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/lh6su778cr3htcecnfvhkmm546/wituropela.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077901a6ee30---kaduxobejewerajunotujoke.pdf
    • https://x-software.cz/data/file/25460462804.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd067dfbb6---58639877734.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d907f577af---77304631559.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/349d834830e75a557f0b7993ae4b204a/jovapagegazababewivelaze.pdf
    • http://akcjonariusz.com/UserFiles/file/petopalofizeseranukupo.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/94auoog4qemj7eetf7ndnekuhr/zupovapawepo.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/87d84fc593310f24849c560fb23ab98f/40179388692.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc153791da---biwuserokiv.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=apa+reporting+mann+whitney+u+test

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