Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d6a4045abe2604…

MALICIOUS

PDF

45.6 KB Created: 2021-09-16 18:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0a2d4c8f31432606dd4200087a0ef22c SHA-1: e0b8d9de6642731c3f8c6638a29411e51b7bc79a SHA-256: 45d6a4045abe26043e3b24cd6f1664c42d9395ebe939098c0d76b51765040b84
124 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous embedded URLs pointing to various domains, many of which appear to be disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating a likely attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5698

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://catamma.ru/uplcv?utm_term=wps+available+hack PDF link annotation
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/7jkrt4ctpvlt2c8tokdlu2n2a9/fasixageb.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/35694285942.pdfIn PDF document text
    • http://104408017.linker.tw/files/linulutobowasagedusebefo.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/75758015339.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/4564131903.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/17391347445.pdfIn PDF document text
    • http://thecargonepal.com/userfiles/file/37002644592.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f88d9b4f19---79698597874.pdfIn PDF document text
    • http://xn--80aamwn.xn--p1ai/userfiles/file/76882685117.pdfIn PDF document text

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