Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e14206f2936849…

MALICIOUS

PDF

15.7 KB Created: 2019-04-30 04:31:57 +01:00 Authoring application: mPDF 5.7
MD5: c5b602012237fce2f722b03e1ee8303e SHA-1: b3691f96414dbe71f62c35651626468edd1556be SHA-256: 77e14206f29368491b16e1f7357b82c4dd6b08c6363ecc0c0a72ad643f4bae84
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which are presented as book titles, suggesting a link farm designed to trick users into downloading potentially malicious files. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, preventing a deeper analysis of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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/1a00a01a08a02a09a03/The-Lost-Bradbury-Forgotten-Tales-of-Ray-Bradbury-by-Ray-Bradbury.pdf
    • http://muicuiu.dumb1.com/1a00a01a08a01a07a09/The-Bradbury-Chronicles-stories-in-Honor-of-Ray-Bradbury-by-William-F-Nolan.pdf
    • http://muicuiu.dumb1.com/8a03a06a06a08/Green-Shadows-White-Whale-A-Novel-of-Ray-Bradbury-s-Adventures-Making-Moby-Dick-with-John-Huston-in-Ireland-by-Ray-Bradbury.pdf
    • http://muicuiu.dumb1.com/1a00a01a08a02a01a00/Listen-to-the-Echoes-The-Ray-Bradbury-Interviews-by-Ray-Bradbury.pdf
    • http://muicuiu.dumb1.com/1a00a01a08a02a04a01/The-Complete-Poems-of-Ray-Bradbury-by-Ray-Bradbury.pdf
    • http://muicuiu.dumb1.com/2a09a00a09a05a04/The-Spell-and-the-Scythe-Merrydian-s-Gate-2-by-A-E-Wright.pdf
    • http://muicuiu.dumb1.com/7a04a06a09a04/Die-H-ter-des-Todes-Arc-of-a-Scythe-1-by-Neal-Shusterman.pdf
    • http://muicuiu.dumb1.com/1a00a01a08a02a04a02/The-Ray-Bradbury-Chronicles-2-by-Ray-Bradbury.pdf
    • http://muicuiu.dumb1.com/1a00a01a08a01a07a08/Bradbury-Thirteen-by-Ray-Bradbury.pdf
    • http://muicuiu.dumb1.com/1a00a01a08a03a00a03/Ray-Bradbury-Chronicles-4-by-Ray-Bradbury.pdf
    • http://muicuiu.dumb1.com/1a00a01a08a03a00a04/The-Novels-Of-Ray-Bradbury-by-Ray-Bradbury.pdf
    • http://muicuiu.dumb1.com/1a02a02a03a00a09/Scythe-Dimension-Drift-Prequels-1-by-Christina-Bauer.pdf
    • http://muicuiu.dumb1.com/1a01a00a07a06a01/Scythe-Dimension-Drift-Prequels-1-by-Christina-Bauer.pdf
    • http://muicuiu.dumb1.com/1a09a05a04a06a06/Sword-of-Deaths-The-Scythe-Wielder-s-Secret-2-by-Christopher-Mannino.pdf
    • http://muicuiu.dumb1.com/2a06a09a05a09a06/I-See-You-Never-by-Ray-Bradbury.pdf
    • http://muicuiu.dumb1.com/2a03a08a04a03a08/All-Summer-in-a-Day-by-Ray-Bradbury.pdf
    • http://muicuiu.dumb1.com/3a02a06a07a09/Something-Wicked-This-Way-Comes-by-Ray-Bradbury.pdf
    • http://muicuiu.dumb1.com/3a08a08a06a04/Fahrenheit-451-by-Ray-Bradbury.pdf
    • http://muicuiu.dumb1.com/4a00a09a04a01/The-Veldt-by-Ray-Bradbury.pdf
    • http://muicuiu.dumb1.com/5a06a07a08a05a00/Fahrenheit-451-by-Ray-Bradbury.pdf

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