Malicious PDF — malware analysis report

Static analysis result for SHA-256 c887daa782f2858d…

MALICIOUS

PDF

13.4 KB Created: 2019-04-30 03:51:40 +01:00 Authoring application: mPDF 5.7
MD5: ee582a6b11f28534c57d6377c51e9be6 SHA-1: 5ca496989b1528ba5b31dca17d9f1bc16cabf1f3 SHA-256: c887daa782f2858d618216e4f3a35f181b399229f0ddadc4cdb6d46f70f6f686
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external websites, a technique often used for SEO poisoning or to redirect users to malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure. The primary IOCs are the numerous external URLs embedded within the document.

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://muicuiu.dumb1.com/3a04a02a01a09a07/Drawn-Deeper-Lockhart-Brothers-3-by-Brenda-Rothert.pdf
    • http://muicuiu.dumb1.com/3a04a06a05a01a00/Deep-Down-Lockhart-Brothers-1-by-Brenda-Rothert.pdf
    • http://muicuiu.dumb1.com/1a04a05a00a01a04/Now-and-Then-Now-1-by-Brenda-Rothert.pdf
    • http://muicuiu.dumb1.com/4a06a05a04/Hooked-by-Brenda-Rothert.pdf
    • http://muicuiu.dumb1.com/8a02a06a02a08a02/Come-Closer-by-Brenda-Rothert.pdf
    • http://muicuiu.dumb1.com/1a09a00a06a07a03/Edge-Fire-on-Ice-3-by-Brenda-Rothert.pdf
    • http://muicuiu.dumb1.com/3a00a08a07a08a09/Killian-On-the-Line-1-by-Brenda-Rothert.pdf
    • http://muicuiu.dumb1.com/1a09a00a06a09a02/Drive-Fire-on-Ice-4-by-Brenda-Rothert.pdf
    • http://muicuiu.dumb1.com/1a04a07a08a02a09/The-Complete-Fire-on-Ice-Series-Fire-on-Ice-1-5-by-Brenda-Rothert.pdf
    • http://muicuiu.dumb1.com/1a03a01a09a05a08/Once-We-Were-Brothers-Liam-Taggart-amp-Catherine-Lockhart-1-by-Ronald-H-Balson.pdf
    • http://muicuiu.dumb1.com/5a01a01a00a05/Drawn-Drawn-1-by-Lilliana-Anderson.pdf
    • http://muicuiu.dumb1.com/2a05a09a01a00a08/Deeper-The-Deeper-Chronicles-1-by-Allyn-Lesley.pdf
    • http://muicuiu.dumb1.com/1a06a00a06a06a05/Drawn-Together-by-Z-A-Maxfield.pdf
    • http://muicuiu.dumb1.com/9a02a09a07a05/Drawn-by-Marie-Lamba.pdf
    • http://muicuiu.dumb1.com/6a00a00a05a03a08/Drawn-and-Quartered-by-Charles-Addams.pdf
    • http://muicuiu.dumb1.com/1a00a05a03a03a06a03/At-Daggers-Drawn-by-Lois-Menzel.pdf
    • http://muicuiu.dumb1.com/6a02a09a08a01a04/Drawn-to-Perfection-by-Victoria-Owens.pdf
    • http://muicuiu.dumb1.com/6a08a06a06a08a04/Drawn-to-Life-by-Elisabeth-Wagner.pdf
    • http://muicuiu.dumb1.com/5a02a08a03a09a08/Drawn-to-You-Swanson-Court-1-by-Serena-Grey.pdf
    • http://muicuiu.dumb1.com/7a06a08a02a02a04/Drawn-to-You-A-conversation-comic-by-Erika-Moen.pdf
    • http://muicuiu.dumb1.com/2a05a09a01a00a08/Deeper-T

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