Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8aa993b23dd38d7…

MALICIOUS

PDF

14.7 KB Created: 2019-04-30 03:24:49 +01:00 Authoring application: mPDF 5.7
MD5: b7ff4e185d1505b9f3882274f2be944f SHA-1: 5ac909d66b110ab93d4a955e91aaff871a670b4f SHA-256: e8aa993b23dd38d7a5d90266a53b1268dccdd4d081c8f8d19385eabb1b838107
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified as a link farm. While most of these URLs are marked as benign, the heuristic 'PDF_SEO_LINK_FARM' and the ML classifier strongly indicate malicious intent. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous links suggests an attempt to direct users to malicious sites or for SEO poisoning. No scripts were extracted from this sample.

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://loaminoo.linkpc.net/1091094096094096090/37-Color-Paintings-of-Alexander-Orlowski---Polish-Genre-Painter-March-9-1777---March-13-1832-by-Jacek-Michalak.pdf
    • http://loaminoo.linkpc.net/7093098090097090/A-Treasury-of-Polish-Aphorisms-by-Jacek-Galazka.pdf
    • http://loaminoo.linkpc.net/1094099094092/The-March-by-E-L-Doctorow.pdf
    • http://loaminoo.linkpc.net/4095091097096/The-Violets-of-March-by-Sarah-Jio.pdf
    • http://loaminoo.linkpc.net/6092095099098096/March-On-by-David-Johnson.pdf
    • http://loaminoo.linkpc.net/4099092093090093/March-to-November-by-Byddi-Lee.pdf
    • http://loaminoo.linkpc.net/8096093094/Richer-Than-Sin-Sin-1-by-Meghan-March.pdf
    • http://loaminoo.linkpc.net/1096092096094/The-Bad-Seed-by-William-March.pdf
    • http://loaminoo.linkpc.net/1096090099098098/Looking-for-Trouble-And-Other-Stories-by-R-J-March.pdf
    • http://loaminoo.linkpc.net/2093090092095/March-by-Geraldine-Brooks.pdf
    • http://loaminoo.linkpc.net/2092090092096097/Girl-Three-by-Tracy-March.pdf
    • http://loaminoo.linkpc.net/4096090098090091/Take-Me-Back-by-Meghan-March.pdf
    • http://loaminoo.linkpc.net/1091093098091099098/403-Color-Paintings-of-Wassily-Kandinsky-by-Michal-Bak.pdf
    • http://loaminoo.linkpc.net/4092094098091090/March-to-the-Sea-Empire-of-Man-2-by-David-Weber.pdf
    • http://loaminoo.linkpc.net/1097098096094/Love-to-the-Spirits-by-Stephen-March.pdf
    • http://loaminoo.linkpc.net/1093093090093090/Sherman-s-March-by-Cynthia-Bass.pdf
    • http://loaminoo.linkpc.net/1098099098096096/My-Grandmother-Is-Praying-for-Me-by-Kathryn-March.pdf
    • http://loaminoo.linkpc.net/4093093093097093/The-Radetzky-March-by-Joseph-Roth.pdf
    • http://loaminoo.linkpc.net/4096098090095096/March-Farm-by-Nancy-McMillan.pdf
    • http://loaminoo.linkpc.net/7097099098099099/March-To-Quebec-by-Kenneth-Roberts.pdf

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