Malicious PDF — malware analysis report

Static analysis result for SHA-256 16419e1d64a7dfee…

MALICIOUS

PDF

14.7 KB Created: 2019-04-30 04:25:51 +01:00 Authoring application: mPDF 5.7
MD5: 983060d81b1413957a17cb626e28d1f3 SHA-1: 3c2722e9b46eb80a8115b7d16461b86fd42553a6 SHA-256: 16419e1d64a7dfee6febf0ff16d6aed05562c28d0a686f90b3aa41a01e229fed
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, a technique often used for SEO spam or to distribute malicious content. While the ML classifier flagged this as malicious with high confidence, the specific intent beyond link farming is unclear as no scripts were extracted. The presence of a 'download button' heuristic suggests a potential lure for users to click these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/1a09a06a04a02a02/Cinderella-Stays-Late-Grimmtastic-Girls-1-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/2a07a05a01a00a03/Snow-White-Lucks-Out-Grimmtastic-Girls-3-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/2a07a05a01a00a00/Rapunzel-Cuts-Loose-Grimmtastic-Girls-4-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/6a07a03a08a04/Medusa-the-Mean-Goddess-Girls-8-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/6a01a06a04a00/Athena-the-Wise-Goddess-Girls-5-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/3a01a09a06a07a08/Athena-the-Wise-Goddess-Girls-5-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/1a02a00a00a09a08/Pandora-the-Curious-Goddess-Girls-9-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/4a09a08a00a03/Athena-the-Brain-Goddess-Girls-1-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/1a02a00a01a08a04/Persephone-the-Daring-Goddess-Girls-11-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/2a07a04a08a08a03/Amphitrite-the-Bubbly-Goddess-Girls-17-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/6a03a09a08a06/Aphrodite-the-Diva-Goddess-Girls-6-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/8a06a05a00a05a04/Medea-the-Enchantress-Goddess-Girls-23-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/5a08a08a00a08/Little-Red-Writing-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/1a00a00a08a08a04a02/Who-Was-Johnny-Appleseed-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/1a02a00a01a08a01/The-Girl-Games-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/1a00a03a08a05a08a08/What-Is-the-Statue-of-Liberty-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/1a06a06a08a01a06/Geogra-Fleas-Riddles-All-Over-the-Map-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/2a07a05a01a01a01/Do-Not-Open-The-Story-of-Pandora-s-Box-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/1a01a06a08a04a04a07/Mini-Myths-Be-Careful-Icarus-by-Joan-Holub.pdf
    • http://muicuiu.dumb1.com/1a02a00a03a04a07/Hades-and-the-Helm-of-Darkness-Heroes-in-Training-3-by-Joan-Holub.pdf

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