Malicious PDF — malware analysis report

Static analysis result for SHA-256 657762f4221b9f7c…

MALICIOUS

PDF

16.9 KB Created: 2019-04-30 04:12:44 +01:00 Authoring application: mPDF 5.7
MD5: 453816a4d6d9715e50603ef8ab6972fb SHA-1: e1559554fec8ba7b0a17b2e39dbe54d3ecc516e4 SHA-256: 657762f4221b9f7c53e06881989d1853d139bc185d9d162fd9c273fd0b52f9b0
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, identified as a 'PDF_SEO_LINK_FARM' heuristic. While the document body is heavily obfuscated, the presence of numerous links suggests an attempt to manipulate search engine results or direct users to a large collection of content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 3

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/9a05a01a08a05a01/Sacco-and-Vanzetti-Rebel-Lives-by-Nicola-Sacco.pdf
    • http://muicuiu.dumb1.com/9a05a01a09a02a09/Sacco-and-Vanzetti-by-Elaine-Landau.pdf
    • http://muicuiu.dumb1.com/9a05a01a07a03a03/Sacco-and-Vanzetti-Must-Die-by-Mark-Binelli.pdf
    • http://muicuiu.dumb1.com/9a05a01a09a02a04/Sacco-and-Vanzetti-Labor-s-Martyrs-by-Max-Shachtman.pdf
    • http://muicuiu.dumb1.com/9a05a01a08a05a09/The-Legacy-of-Sacco-and-Vanzetti-by-Louis-Joaghin.pdf
    • http://muicuiu.dumb1.com/9a05a01a08a05a07/Sacco-and-Vanzetti-Murderers-or-Murdered-by-Harold-Blumenfeld.pdf
    • http://muicuiu.dumb1.com/9a05a02a00a01a02/The-Life-and-Death-of-Sacco-and-Vanzetti-by-Eugene-Lyons.pdf
    • http://muicuiu.dumb1.com/9a05a02a00a01a01/The-Verdict-of-History-Sacco-and-Vanzetti-by-Frank-M-D-39-Alessandro.pdf
    • http://muicuiu.dumb1.com/1a06a09a01a04/Sacco-and-Vanzetti-The-Men-the-Murders-and-the-Judgment-of-Mankind-by-Bruce-Watson.pdf
    • http://muicuiu.dumb1.com/9a05a01a08a05a06/The-Sacco-and-Vanzetti-Case-A-Brief-History-with-Documents-by-Michael-M-Topp.pdf
    • http://muicuiu.dumb1.com/9a05a02a00a08a04/The-Trial-of-Sacco-and-Vanzetti-A-Primary-Source-Account-by-Kerry-Hinton.pdf
    • http://muicuiu.dumb1.com/9a05a01a08a05a08/Heroes-amp-Martyrs-Emma-Goldman-Sacco-amp-Vanzetti-and-the-Revolutionary-Struggle-by-Howard-Zinn.pdf
    • http://muicuiu.dumb1.com/9a05a02a00a01a00/Sacco-and-Vanzetti-The-History-of-20th-Century-America-s-Most-Controversial-Case-by-Charles-River-Editors.pdf
    • http://muicuiu.dumb1.com/2a07a09a09a05a02/Famous-Players-by-Rick-Geary.pdf
    • http://muicuiu.dumb1.com/2a08a00a00a02a08/The-Lindbergh-Child-by-Rick-Geary.pdf
    • http://muicuiu.dumb1.com/2a07a09a07a09a04/A-Treasury-of-Victorian-Murder-by-Rick-Geary.pdf
    • http://muicuiu.dumb1.com/2a05a03a05a06a02/The-Case-of-Madeleine-Smith-by-Rick-Geary.pdf
    • http://muicuiu.dumb1.com/3a00a05a08a04a06/J-Edgar-Hoover-A-Graphic-Biography-by-Rick-Geary.pdf
    • http://muicuiu.dumb1.com/3a00a06a03a00a02/The-Fatal-Bullet-The-Assassination-of-James-A-Garfield-by-Rick-Geary.pdf
    • http://muicuiu.dumb1.com/4a08a05a05a05a04/Living-in-Ether-by-Patricia-Geary.pdf

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