Malicious PDF — malware analysis report

Static analysis result for SHA-256 615d4f6994d20361…

MALICIOUS

PDF

60.8 KB Created: 2021-09-20 14:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1e797a65d0b5e7a169e8a00fcb4bb7ab SHA-1: d570ad9f0a89c05c257092fa2d74128da16bcdaa SHA-256: 615d4f6994d2036198069460f4578d31739ef0be914a33c47a305b351651f7a1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that lead to other PDF files, forming a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7685

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oazapiekna.com/zdjecia/fck/file/kovamadufibedu.pdf In PDF document text
    • http://space-edge.com/upload/files/gajiderajanakasowesosuj.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/51871886a3d91c710cac515f47c21305/34170864249.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/gexedilepazit.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/42179028834.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/nuxaxigolonobujemimuwiwi.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/12405346763.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/pipokatijamug.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/94543004286.pdfIn PDF document text
    • http://arsvet.ru/img/upload/tuwafixumugogi.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/55238096793.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/06cc4e0a901f5fd035e7fc3d961f2cb2/18218224711.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/22442546622.pdfIn PDF document text
    • https://newfrio.com/userfiles/files/nuzewakikokatubudufotubi.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/97117651823.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=download+any+movie+freePDF link annotation

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