Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9186aa3d50beb7…

MALICIOUS

PDF

20.7 KB Created: 2019-04-29 23:05:55 +01:00 Authoring application: mPDF 5.7
MD5: 06daa53b5074a9685a98112c1d422ed1 SHA-1: 8e0860093ea86b7a92c62185619386a532327edf SHA-256: 3a9186aa3d50beb7b3d01edfa5617f53d484dbad2331a47aaba4cf8cde69ecac
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing:Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While most of the linked URLs themselves are benign, the sheer volume and structure suggest a malicious intent, possibly for SEO poisoning or to distribute further malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, preventing a more detailed analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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/1a08a07a07a00a01/At-The-President-s-Request-by-John-Keith-Roberts.pdf
    • http://muicuiu.dumb1.com/6a06a05a00a02a09/The-First-President-A-Life-of-John-L-Dube-Founding-President-of-the-ANC-by-Heather-Hughes.pdf
    • http://muicuiu.dumb1.com/2a04a03a05a00a07/Everybody-s-History-Indiana-s-Lincoln-Inquiry-and-the-Quest-to-Reclaim-a-President-s-Past-by-Keith-A-Erekson.pdf
    • http://muicuiu.dumb1.com/1a00a07a05a00a06/Gr-inne-by-Keith-Roberts.pdf
    • http://muicuiu.dumb1.com/1a01a04a05a01a02a08/John-Tyler-the-Accidental-President-by-Edward-P-Crapol.pdf
    • http://muicuiu.dumb1.com/1a00a08a02a05a01a00/John-Adams-2nd-President-of-the-United-States-by-Heidi-Elston.pdf
    • http://muicuiu.dumb1.com/2a02a06a02a07a01/Thanks-and-Have-Fun-Running-the-Country-Kids-Letters-to-President-Obama-by-Jory-John.pdf
    • http://muicuiu.dumb1.com/2a05a07a08a03a09/Contract-on-America-The-Mafia-Murder-of-President-John-F-Kennedy-by-David-E-Scheim.pdf
    • http://muicuiu.dumb1.com/9a06a06a08a06a03/Keith-Haring-The-Authorized-Biography-by-John-Gruen.pdf
    • http://muicuiu.dumb1.com/3a02a09a06a03/John-Oliver-Killens-A-Life-of-Black-Literary-Activism-by-Keith-Gilyard.pdf
    • http://muicuiu.dumb1.com/8a06a02a03a04/-quot-The-President-Has-Been-Shot-quot-The-Assassination-of-John-F-Kennedy-by-James-L-Swanson.pdf
    • http://muicuiu.dumb1.com/2a04a04a02a08a08/-quot-The-President-Has-Been-Shot-quot-The-Assassination-of-John-F-Kennedy-by-James-L-Swanson.pdf
    • http://muicuiu.dumb1.com/9a03a09a00a09a01/The-President-s-Affair-A-Dramatization-of-the-Clinton-Lewinsky-Affair-by-John-Gordon-Gray.pdf
    • http://muicuiu.dumb1.com/7a00a04a06a09a08/Conan-the-Valorous-by-John-Maddox-Roberts.pdf
    • http://muicuiu.dumb1.com/4a03a05a04a01a08/Space-Angel-by-John-Maddox-Roberts.pdf
    • http://muicuiu.dumb1.com/7a00a05a05a09a02/The-Roberts-Orme-Ancestry-by-John-F-Vallentine.pdf
    • http://muicuiu.dumb1.com/3a03a00a01a03a07/The-Steel-Kings-by-John-Maddox-Roberts.pdf
    • http://muicuiu.dumb1.com/1a00a08a07a08a05a01/Dutch-and-Gina-The-President-s-Girlfriend-The-President-s-Girlfriend-1-by-Mallory-Monroe.pdf
    • http://muicuiu.dumb1.com/3a03a00a01a03a02/The-Islander-Stormlands-Book-1-by-John-Maddox-Roberts.pdf
    • http://muicuiu.dumb1.com/2a01a00a05a03a01/SPQR-XII-Oracle-of-the-Dead-by-John-Maddox-Roberts.pdf
    • http://muicuiu.dumb1.com/2a02a06a02a07a01/Thanks-and-Have-Fun-Running-the-Country-Kids-Letters-to

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