Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fcd7a76c9d6b195…

MALICIOUS

PDF

16.6 KB Created: 2019-05-02 05:15:31 +01:00 Authoring application: mPDF 5.7
MD5: 173b4f49c92b4a8d0a6ca179c9f131f5 SHA-1: 8ba9560008b18cd19729c52532ac2f55a8b64f9d SHA-256: 9fcd7a76c9d6b1954440c34ef0e5fb105fe245fb9500806977e8a9e080c29f56
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. While the URLs themselves are marked as benign, the sheer volume and the nature of the heuristic suggest a malicious intent, possibly for SEO manipulation or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://loaminoo.linkpc.net/9093090099096095/Drei-Mann-in-einem-Boot-vom-Hunde-ganz-zu-schweigen-by-Jerome-K-Jerome.pdf
    • http://loaminoo.linkpc.net/1090090090096098099/Abenteuer-am-Blauen-Nil-Drei-Mann-ein-Boot-zum-Rudolfsee-Zwei-Abenteuer-in-einem-Band-by-R-diger-Nehberg.pdf
    • http://loaminoo.linkpc.net/5096098099091099/Selected-Short-Stories-From-Jerome-K-Jerome-by-Jerome-K-Jerome.pdf
    • http://loaminoo.linkpc.net/6091098098098091/Provencal-Letters-and-Idle-Thoughts-by-Jerome-K-Jerome.pdf
    • http://loaminoo.linkpc.net/5096099090094095/Jerome-K-Jerome-A-Critical-Biography-by-Joseph-Connolly.pdf
    • http://loaminoo.linkpc.net/1091090090095098090/Mrs-Korner-Sins-Her-Mercies-by-Jerome-K-Jerome.pdf
    • http://loaminoo.linkpc.net/5096099090093090/Second-Thoughts-Of-An-Idle-Fellow-by-Jerome-K-Jerome.pdf
    • http://loaminoo.linkpc.net/5096098099098093/The-Works-of-Jerome-K-Jerome-by-Jerome-K-Jerome.pdf
    • http://loaminoo.linkpc.net/5096098099098097/Told-After-Supper-by-Jerome-K-Jerome.pdf
    • http://loaminoo.linkpc.net/1090098094099094093/Liebesleben-Mann-und-Frau-Sp-te-Familie-Drei-Romane-in-einem-Band-by-Zeruya-Shalev.pdf
    • http://loaminoo.linkpc.net/3092099099097/Three-Men-in-a-Boat-Three-Men-1-by-Jerome-K-Jerome.pdf
    • http://loaminoo.linkpc.net/6096096091090/Three-Men-on-the-Bummel-Three-Men-2-by-Jerome-K-Jerome.pdf
    • http://loaminoo.linkpc.net/7096092097096099/Three-Men-in-a-Boat-by-Jerome-K-Jerome.pdf
    • http://loaminoo.linkpc.net/2096094097095090/Three-Men-in-a-Boat-To-Say-Nothing-of-the-Dog-by-Jerome-K-Jerome.pdf
    • http://loaminoo.linkpc.net/3097090093098092/Three-Men-in-a-Boat-by-Jerome-K-Jerome.pdf
    • http://loaminoo.linkpc.net/1097095096096096/Three-Men-in-a-Boat-by-Jerome-K-Jerome.pdf
    • http://loaminoo.linkpc.net/9094093092097099/Wie-Die-Dackel-in-Die-Welt-Kamen-Die-Ganz-Besondere-Kurze-Geschichte-Von-Einem-Ganz-Besonderen-Langen-Hund-Tall-Tales-1-by-Kizzie-Elizabeth-Jones.pdf
    • http://loaminoo.linkpc.net/6098092098098096/Sardou-and-the-Sardou-Plays-by-Jerome-A-Hart-by-Jerome-Alfred-Hart.pdf
    • http://loaminoo.linkpc.net/1090096099094097090/Jerome-Liebling-Photographs-by-Jerome-Liebling.pdf
    • http://loaminoo.linkpc.net/6094099092094099/Gaelle-and-Jerome-2-Gaelle-And-Jerome-2-by-M-P-Franck.pdf
    • http://loaminoo.linkpc.net/5096098099098097/Told-After-Suppe

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