Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbdf5c1c13f3c02f…

MALICIOUS

PDF

18.2 KB Created: 2019-04-30 04:01:35 +01:00 Authoring application: mPDF 5.7
MD5: 6cb2a232e6a51f1358e25492c5080d44 SHA-1: 086019d8c7ca86f00406164d04603189de843437 SHA-256: cbdf5c1c13f3c02f2e3543fddee7e0ba7124da0ecfbe7a3c319a765ce90d238d
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the PDF structure and embedded URLs suggest a delivery mechanism for further compromise. The primary attack pattern involves directing users to a link farm of potentially malicious or misleading documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/1a01a02a00a01a08/A-Journey-to-the-New-World-The-Diary-of-Remember-Patience-Whipple-Mayflower-1620-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/1a01a05a01a06a01/The-Night-Journey-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/4a06a07a07a02/Dreams-In-The-Golden-Country-the-Diary-of-Zipporah-Feldman-a-Jewish-Immigrant-Girl-New-York-City-1903-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/2a05a02a01a09a09/Mary-Queen-of-Scots-A-Scottish-Queen-s-Diary-France-1553-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/4a08a06a08a01a03/Memoirs-of-a-Bookbat-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/4a09a02a07a02a02/The-Crossing-Daughters-of-the-Sea-4-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/1a02a01a00a03a01/Lucy-Daughters-of-the-Sea-3-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/5a08a09a07a03a09/Der-Clan-der-W-lfe-4-Eisk-nig-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/2a04a04a02a02a07/Star-Wolf-Wolves-of-the-Beyond-6-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/1a02a09a07a05a08/Dancing-Through-Fire-Portraits-1-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/4a01a08a03a06/The-War-of-the-Ember-Guardians-of-Ga-Hoole-15-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/5a08a09a07a05a04/Sternenseher-Der-Clan-der-W-lfe-6-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/4a07a08a00a02/The-First-Collier-Guardians-of-Ga-Hoole-9-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/6a00a01a04a02a01/Les-Gardiens-de-Ga-Hoole---tome-1-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/2a08a05a07a08a06/Elizabeth-I-Red-Rose-of-the-House-of-Tudor-England-1544-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/1a00a02a03a07a04/Vision-of-Beauty-The-Story-of-Sarah-Breedlove-Walker-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/1a03a08a00a05a01/Marie-Antoinette-Princess-of-Versailles-Austria---France-1769-Royal-Diaries-4-by-Kathryn-Lasky.pdf
    • http://muicuiu.dumb1.com/5a06a09a02a08/The-Mayflower-and-the-Pilgrims-New-World-by-Nathaniel-Philbrick.pdf
    • http://muicuiu.dumb1.com/3a07a05a02a08a05/A-Promise-to-Remember-by-Kathryn-Cushman.pdf
    • http://muicuiu.dumb1.com/3a08a00a06a02a07/War-of-the-World-Records-The-Fantastic-Family-Whipple-2-by-Matthew-Ward.pdf
    • http://muicuiu.dumb1.com/

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