Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c7c552db2f12a9…

MALICIOUS

PDF

13.1 KB Created: 2019-05-08 18:41:32 +01:00 Authoring application: mPDF 5.7
MD5: e18fb953f6004f9013c63544b3cb6d23 SHA-1: 1a932bdda88163b08449ebc40efae2e314c33178 SHA-256: e1c7c552db2f12a9bae322d5eda623ca507f284daf5a07fe5be792d0c08bd48f
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, which are likely used for SEO poisoning or to drive traffic to malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the sheer volume of links suggests a content-driven lure, possibly to a phishing site or malware download. The URLs themselves appear to be benign, but their aggregation in this manner is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8891

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://muicuiu.dumb1.com/3a08a00a07a07/Ballet-Shoes-Shoes-1-by-Noel-Streatfeild.pdf
    • http://muicuiu.dumb1.com/3a06a06a03a01a04/Ballet-Shoes-by-Noel-Streatfeild.pdf
    • http://muicuiu.dumb1.com/4a06a05a02a00a05/Circus-Shoes-Shoes-3-by-Noel-Streatfeild.pdf
    • http://muicuiu.dumb1.com/4a02a00a06a09a06/Dancing-Shoes-by-Noel-Streatfeild.pdf
    • http://muicuiu.dumb1.com/1a01a05a06a00a06a01/Ruby-Red-Shoes-Goes-to-London-Ruby-Red-Shoes-Book-3-by-Kate-Knapp.pdf
    • http://muicuiu.dumb1.com/1a01a09a06a06a02/Blue-Shoes-Vol-3-Blue-Shoes-3-by-J-J-Knight.pdf
    • http://muicuiu.dumb1.com/4a00a08a08a04a03/Saplings-by-Noel-Streatfeild.pdf
    • http://muicuiu.dumb1.com/5a00a05a08a03a03/Caldicott-Place-by-Noel-Streatfeild.pdf
    • http://muicuiu.dumb1.com/1a01a01a00a02a00/When-the-Sirens-Wailed-by-Noel-Streatfeild.pdf
    • http://muicuiu.dumb1.com/8a07a06a01a00/The-Painted-Garden-by-Noel-Streatfeild.pdf
    • http://muicuiu.dumb1.com/3a02a05a09a07a07/The-Painted-Garden-by-Noel-Streatfeild.pdf
    • http://muicuiu.dumb1.com/1a03a05a00a03a08/The-Children-on-the-Top-Floor-by-Noel-Streatfeild.pdf
    • http://muicuiu.dumb1.com/1a00a01a04a03a02a06/Reiseschuhe-Schuh-B-cher-0-by-Noel-Streatfeild.pdf
    • http://muicuiu.dumb1.com/6a00a04a01a01a02/The-Barrow-Lane-Gang-by-Noel-Streatfeild.pdf
    • http://muicuiu.dumb1.com/8a07a08a02a08/A-Vicarage-family-A-biography-of-myself-by-Noel-Streatfeild.pdf
    • http://muicuiu.dumb1.com/3a08a06a03a02a00/Two-Little-Shoes-by-Razvan.pdf
    • http://muicuiu.dumb1.com/2a02a01a04a00a04/Man-Shoes-by-Tom-Watson.pdf
    • http://muicuiu.dumb1.com/4a05a02a01a08a02/In-Her-Shoes-by-Jennifer-Weiner.pdf
    • http://muicuiu.dumb1.com/4a02a00a02a01a09/Ten-Shoes-Up-by-Gary-Stuart.pdf
    • http://muicuiu.dumb1.com/9a02a08a03a05/Those-Shoes-by-Maribeth-Boelts.pdf
    • http://muicuiu.dumb1.com/6a00a04a01a01a02/The-Barrow-Lane-Gang-by-Noel-Str

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