Malicious PDF — malware analysis report

Static analysis result for SHA-256 704d4cfb05a7f03d…

MALICIOUS

PDF

15.7 KB Created: 2019-05-02 16:47:46 +01:00 Authoring application: mPDF 5.7
MD5: 2e728805a19a56adae062a192d913413 SHA-1: def5501cabcd2faae6f92b66cd33d546067f33dc SHA-256: 704d4cfb05a7f03d76ac246b25abfd18f534a137511afdf9d88c91ec4071b476
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified as a link farm, pointing to various book titles. While the URLs themselves are currently marked as benign, the sheer volume and the heuristic 'PDF_SEO_LINK_FARM' suggest a malicious intent, possibly for SEO manipulation or to host further malicious content. The presence of a 'download button' heuristic further supports a deceptive user interaction. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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/1a00a00a05a05a05a03/Curious-George-and-the-Pizza-Party-by-Margret-Rey.pdf
    • http://muicuiu.dumb1.com/4a05a06a00a05a00/Curious-George-Goes-to-the-Circus-by-Margret-Rey.pdf
    • http://muicuiu.dumb1.com/3a01a01a03a09a09/Curious-George-Goes-to-a-Movie-by-Margret-Rey.pdf
    • http://muicuiu.dumb1.com/3a01a01a03a05a09/Curious-George-Makes-Pancakes-by-Margret-Rey.pdf
    • http://muicuiu.dumb1.com/5a06a00a05a06a05/Curious-George-at-the-Fire-Station-by-Margret-Rey.pdf
    • http://muicuiu.dumb1.com/9a00a06a05a08/The-Complete-Adventures-of-Curious-George-by-Margret-Rey.pdf
    • http://muicuiu.dumb1.com/3a09a00a01a07a00/Curious-George-Builds-a-Home-by-Margret-Rey.pdf
    • http://muicuiu.dumb1.com/3a01a06a03a02a00/The-Journey-That-Saved-Curious-George-The-True-Wartime-Escape-of-Margret-and-H-A-Rey-by-Louise-Borden.pdf
    • http://muicuiu.dumb1.com/4a07a08a07a04a03/Curious-George-Curious-You-On-Your-Way-by-H-A-Rey.pdf
    • http://muicuiu.dumb1.com/9a06a07a04a09a07/Curious-George-by-H-A-Rey.pdf
    • http://muicuiu.dumb1.com/6a04a02a05a00/Curious-George-by-H-A-Rey.pdf
    • http://muicuiu.dumb1.com/6a07a00a05a05a06/It-s-Ramadan-Curious-George-by-H-A-Rey.pdf
    • http://muicuiu.dumb1.com/4a06a01a02a09a03/Curious-George-Boxcar-Derby-CGTV-8x8-by-H-A-Rey.pdf
    • http://muicuiu.dumb1.com/1a00a00a05a05a02a00/Pizza-on-the-Grill-100-Feisty-Fire-Roasted-Recipes-for-Pizza-amp-More-by-Elizabeth-Karmel.pdf
    • http://muicuiu.dumb1.com/9a06a00a01a05a07/Curious-George-Carry-Along-Coloring-Kit-by-Laura-Floss.pdf
    • http://muicuiu.dumb1.com/4a08a09a02a04a00/A-Pizza-To-Die-For-Pizza-Lovers-3-by-Chris-Cavender.pdf
    • http://muicuiu.dumb1.com/9a05a07a07a06/The-Stars-Seem-so-Far-Away-by-Margr-t-Helgad-ttir.pdf
    • http://muicuiu.dumb1.com/2a07a02a06a03a08/Winter-Tales-by-Margr-t-Helgad-ttir.pdf
    • http://muicuiu.dumb1.com/2a04a01a04a07a07/My-Little-Dinosaur-by-Ilse-Margret-Vogel.pdf
    • http://muicuiu.dumb1.com/9a06a01a06a01a02/VAMPIR-GOTHIC-21-Die-Rebellin-by-Margret-Schwekendiek.pdf

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