Malicious PDF — malware analysis report

Static analysis result for SHA-256 1543d80a20852606…

MALICIOUS

PDF

14.3 KB Created: 2019-05-02 07:05:16 +01:00 Authoring application: mPDF 5.7
MD5: 09d4f779580d521ff8dbafe0d62ca239 SHA-1: e19f7cb5fb127e9c65574f08db3207e95c35d035 SHA-256: 1543d80a208526061c0bfe46a818aab43feb1bec07622004b84d57c52cfcd518
92 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 manipulation or to distribute further malicious content. While the document body is heavily obfuscated, the heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, but the embedded links are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

Heuristics 2

  • 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.
  • 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://cefasfese.4pu.com/1735731736730732/Even-Villains-Fall-In-Love-Heroes-and-Villains-1-by-Liana-Brooks.pdf
    • http://cefasfese.4pu.com/2739731730731735/Even-Villains-Have-Interns-Heroes-and-Villains-3-by-Liana-Brooks.pdf
    • http://cefasfese.4pu.com/4734730739738735/Heroes-And-Villains-The-True-Story-Of-The-Beach-Boys-by-Steven-Gaines.pdf
    • http://cefasfese.4pu.com/5733739733/If-We-Were-Villains-by-M-L-Rio.pdf
    • http://cefasfese.4pu.com/7735732736733/Vicious-Villains-1-by-V-E-Schwab.pdf
    • http://cefasfese.4pu.com/2730738734737732/Warm-Up-Villains-0-5-by-V-E-Schwab.pdf
    • http://cefasfese.4pu.com/6730736732736/Vicious-Villains-1-by-V-E-Schwab.pdf
    • http://cefasfese.4pu.com/2735730731733739/Vicious-Villains-1-by-V-E-Schwab.pdf
    • http://cefasfese.4pu.com/1735736734734734/Villains-by-Necessity-by-Eve-Forward.pdf
    • http://cefasfese.4pu.com/1739733730739732/Villains-United-by-Gail-Simone.pdf
    • http://cefasfese.4pu.com/7736730733730/Writing-About-Villains-by-Rayne-Hall.pdf
    • http://cefasfese.4pu.com/1731738734735734734/Villains-amp-Vodka-Top-Shelf-2-by-Alta-Hensley.pdf
    • http://cefasfese.4pu.com/2739731734733735/Villains-Pride-The-Shadow-Master-2-by-M-K-Gibson.pdf
    • http://cefasfese.4pu.com/2739733732738739/Villains-Rule-The-Shadow-Master-1-by-M-K-Gibson.pdf
    • http://cefasfese.4pu.com/1732734734734731/Villains-Inc-Wearing-the-Cape-2-by-Marion-G-Harmon.pdf
    • http://cefasfese.4pu.com/2731738732738731/Disney-Villains-Mistress-of-All-Evil-Novel-by-Serena-Valentino.pdf
    • http://cefasfese.4pu.com/2732738735739739/I-Wear-the-Black-Hat-Grappling-With-Villains-by-Chuck-Klosterman.pdf
    • http://cefasfese.4pu.com/1730734733734739/Lord-Toede-Dragonlance-Villains-5-by-Jeff-Grubb.pdf
    • http://cefasfese.4pu.com/2737736734734737/Forging-Hephaestus-Villains-Code-1-by-Drew-Hayes.pdf
    • http://cefasfese.4pu.com/3731732739738739/The-Adventures-of-Merlin-Villains-Guide-by-Jacqueline-Rayner.pdf

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