Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b03175dd240315b…

MALICIOUS

PDF

18.5 KB Created: 2019-04-30 03:37:53 +01:00 Authoring application: mPDF 5.7
MD5: b4bb25a7e2798f1f17f33f757acdc00c SHA-1: ffd8e176dad0adc5bd1c5566ead8d197f4003aca SHA-256: 7b03175dd240315b1d480660a9d4079949cf9e9076248fb0d101ca5e7fcccffe
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a link farm, which is a common tactic for SEO poisoning or distributing malicious content. While the URLs themselves are currently marked as benign, the sheer volume and the heuristic firing of PDF_SEO_LINK_FARM indicate a malicious intent to direct users to external resources. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/2a08a09a00a09a08/The-Book-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/1a05a05a04a04a08/The-Complete-Works-of-H-P-Lovecraft-Volume-1-70-Horror-Short-Stories-Novels-and-Juvenilia-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/8a02a04a01a08a01/Lovecraft-s-Legacy-A-Centennial-Celebration-of-H-P-Lovecraft-by-Robert-E-Weinberg.pdf
    • http://muicuiu.dumb1.com/1a05a05a03a02a06/The-Complete-Works-of-H-P-Lovecraft-102-Horror-Short-Stories-Novels-Juvenelia-Collaborations-and-Ghost-Writings-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/3a08a07a00a09a03/The-Lovecraft-Library-Volume-1-Horror-Out-of-Arkham-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/5a03a06a03a09/Black-Seas-of-Infinity-The-Best-of-H-P-Lovecraft-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/3a09a01a00a07a08/H-P-Lovecraft-s-Book-of-the-Supernatural-Classic-Tales-of-the-Macabre-by-Stephen-Jones.pdf
    • http://muicuiu.dumb1.com/8a02a04a02a02a02/Commonplace-Book-of-the-Weird-The-Untold-Stories-of-H-P-Lovecraft-by-Joseph-Fink.pdf
    • http://muicuiu.dumb1.com/3a07a09a00a02a05/The-Lovecraft-Anthology-Volume-2-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/1a01a00a09a01a05a02/Chilling-Tales-of-HP-Lovecraft-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/6a00a03a05a06a06/The-Definitive-H-P-Lovecraft-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/7a03a04a03a06a07/2nd-Edition-Just-1-hour-Amazing-New-Zealand-Travelling-Book-Bring-this-book-to-travel-This-book-is-NEW-This-book-includes-7-important-expression-for-this-book-by-Takuji.pdf
    • http://muicuiu.dumb1.com/7a03a04a06a05a08/Edition-1nd-Just-1-hour-Amazing-Singapore-Travelling-Book-Bring-this-book-to-travel-This-book-is-NEW-This-book-includes-7-important-expression-for-this-book-by-Takuji-Ekawa.pdf
    • http://muicuiu.dumb1.com/1a06a04a07a02a05/The-Temple-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/1a05a08a03a07a04/The-Other-Gods-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/2a02a09a07a06a05/Dagon-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/1a08a05a07a01a05/The-Festival-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/1a08a05a07a01a02/The-Unnamable-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/1a06a04a03a02a06/Polaris-by-H-P-Lovecraft.pdf
    • http://muicuiu.dumb1.com/2a02a09a07a07a02/Cool-Air-by-H-P-Lovecraft.pdf

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