Malicious PDF — malware analysis report

Static analysis result for SHA-256 2228f047a2efc628…

MALICIOUS

PDF

5.2 KB Created: 2015-06-03 16:37:47 +03:00 Authoring application: DOMPDF
MD5: dfe94b925f33e5250f9c7cba7be40eb3 SHA-1: ffbcefa88f4f186791ade0b4aa2b4529891e3efd SHA-256: 2228f047a2efc6289dc2b1960c933bb656f502ff905b70ab6748392d9148d4f8
60 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF documents, a technique often used for SEO manipulation or to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this malicious intent. No scripts were extracted, and the document body content is largely obfuscated or irrelevant, making it difficult to determine a more specific attack pattern or family. The primary IOCs are the numerous external URLs.

Machine Learning

  • Nyx PDF Classifier clean score 0.1448

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.kbb-gesellschaft.de/index.php?2015/ergoarena.pdf&urggv=1&aspx=707
    • http://www.academiafutebolangola.com/index.php?2015/hmdeepfocus.pdf&audtr=1&aspx=621
    • http://www.academiafutebolangola.com/index.php?2015/hmdeepfocus.pdf&audtr=1&aspx=1560
    • http://www.kbb-gesellschaft.de/index.php?2015/ergoarena.pdf&urggv=1&aspx=330
    • http://www.academiafutebolangola.com/index.php?2015/hmdeepfocus.pdf&audtr=1&aspx=2371
    • http://dyrlaegecentret.dk/index.php?2015/typestitch.pdf&hjhle=1&aspx=sitemap

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