Malicious PDF — malware analysis report

Static analysis result for SHA-256 0435e5cb14f6a403…

MALICIOUS

PDF

17.4 KB Created: 2019-04-30 04:30:18 +01:00 Authoring application: mPDF 5.7
MD5: fcbc5adbacaffd4dd906cfd98fb99d1d SHA-1: f69c5ecc4a6e1a3398218b29ac575b60968b25f0 SHA-256: 0435e5cb14f6a4035bb482e71edace327128bd775d4500957f62ae495cb676d5
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with 23 external links, many of which are to book titles, and a visual download button lure. The ML classifier also flagged this PDF as malicious. While the URLs themselves are marked as benign, the overall structure and heuristic firings suggest an attempt to trick the user into downloading further content, likely malicious.

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/9a05a01a08a05a08/Heroes-amp-Martyrs-Emma-Goldman-Sacco-amp-Vanzetti-and-the-Revolutionary-Struggle-by-Howard-Zinn.pdf
    • http://muicuiu.dumb1.com/9a05a01a09a02a04/Sacco-and-Vanzetti-Labor-s-Martyrs-by-Max-Shachtman.pdf
    • 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/9a05a01a08a05a09/The-Legacy-of-Sacco-and-Vanzetti-by-Louis-Joaghin.pdf
    • http://muicuiu.dumb1.com/3a03a08a03a00a05/The-Lives-of-Sacco-and-Vanzetti-by-Rick-Geary.pdf
    • http://muicuiu.dumb1.com/4a02a05a08a07a06/The-Lives-of-Sacco-and-Vanzetti-by-Rick-Geary.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/9a05a01a08a05a07/Sacco-and-Vanzetti-Murderers-or-Murdered-by-Harold-Blumenfeld.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/9a05a02a00a01a00/Sacco-and-Vanzetti-The-History-of-20th-Century-America-s-Most-Controversial-Case-by-Charles-River-Editors.pdf
    • http://muicuiu.dumb1.com/6a08a09a01a03a02/Red-Emma-Speaks-An-Emma-Goldman-Reader-by-Alix-Kates-Shulman.pdf
    • http://muicuiu.dumb1.com/1a05a03a02a03/A-People-s-History-of-the-United-States-by-Howard-Zinn.pdf
    • http://muicuiu.dumb1.com/9a04a06a04a03a00/A-People-s-History-of-the-United-States-by-Howard-Zinn.pdf
    • http://muicuiu.dumb1.com/1a00a07a02a02a09a07/A-People-s-History-of-the-United-States-by-Howard-Zinn.pdf
    • http://muicuiu.dumb1.com/8a06a05a00a07/Declarations-of-Independence-Cross-Examining-American-Ideology-by-Howard-Zinn.pdf

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