Malicious PDF — malware analysis report

Static analysis result for SHA-256 289379438c05eb0f…

MALICIOUS

PDF

13.3 KB Created: 2019-04-30 04:23:56 +01:00 Authoring application: mPDF 5.7
MD5: ba0743bb16b17ed9e8be02050a33f9b9 SHA-1: 3de87d5a1d352d18606a85b1e9b99899d8e31442 SHA-256: 289379438c05eb0ffcc3e4f15b9fd17ab9d635cd732e5f2dc69c7f4c69e3f65e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs, identified as a link farm. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the structure and the sheer volume of links suggest an attempt to manipulate search engine results or distribute further malicious content. The primary attack pattern involves leveraging a PDF to host a large number of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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://loaminoo.linkpc.net/1090093090094094091/Works-by-Poul-Anderson-Book-Guide-Novellas-by-Poul-Anderson-Novels-by-Poul-Anderson-Short-Stories-by-Poul-Anderson-by-Source-Wikipedia.pdf
    • http://loaminoo.linkpc.net/3098091092097098/Mirkheim-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/4095096099093099/Call-Me-Joe-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/6097099090090099/Sentiment-Inc-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/1090093090092099095/The-Man-Who-Counts-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/3098098096097091/The-Day-of-Their-Return-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/5090093090094093/The-Byworlder-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/2097096096096094/The-Devil-s-Game-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/2094096096098/No-Truce-with-Kings-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/7090094096099091/Conan-the-Rebel-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/1098096099098098/The-Rebel-Worlds-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/3092093094097093/Guardians-of-Time-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/2095091094093/The-Enemy-Stars-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/1090093090094094092/The-Winter-of-the-World-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/5095095093092091/Kinship-With-The-Stars-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/1090093090093093096/Virgin-Planet-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/5090092097099090/The-High-Crusade-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/4090099092091092/Operation-Chaos-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/1090093090093094091/A-Circus-of-Hells-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/8096099098096/A-Midsummer-Tempest-by-Poul-Anderson.pdf
    • http://loaminoo.linkpc.net/2095091094093/The-Enemy-Stars-by-Po

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