Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f34f627c0b87bfa…

MALICIOUS

PDF

15.9 KB Created: 2019-05-02 01:25:55 +01:00 Authoring application: mPDF 5.7
MD5: b1c550f06e66b03ec4bff7321903185b SHA-1: c89ffad99e6babe7acbeb1b45489604b7c876c88 SHA-256: 1f34f627c0b87bfac2b086683998feca6a1b1e2d8afc282f725be9ed36c5bceb
90 Risk Score

Malware Insights

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

The PDF file 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 flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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/2093092090098090/Bones-of-the-Past-Arhel-2-by-Holly-Lisle.pdf
    • http://loaminoo.linkpc.net/1090094099094098090/HOLLY-BLACK-SERIES-READING-ORDER-MAGISTERIUM-BOOKS-MODERN-TALE-OF-FAERIE-BOOKS-SPIDERWICK-CHRONICLES-BOOKS-BEYONG-SPIDERWICK-CHRONICLES-GOOD-NEIGHBORS-BOOKS-BY-HOLLY-BLACK-by-List-Series.pdf
    • http://loaminoo.linkpc.net/6098099095098/Black-Heart-Curse-Workers-3-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/2096097090099/Zombies-Vs-Unicorns-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/1093095091092098/The-Copper-Gauntlet-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/3098091090/The-Bronze-Key-Magisterium-3-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/3097094097093092/Kind-The-Good-Neighbors-3-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/1096092096/The-Copper-Gauntlet-Magisterium-2-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/2091094092091096/The-Coldest-Girl-in-Coldtown-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/4092090097090091/The-Copper-Gauntlet-Magisterium-2-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/6096090098/The-Silver-Mask-Magisterium-4-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/9092091092098097/Okrutny-ksi-The-Folk-of-the-Air-1-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/1090097092092093/The-Darkest-Part-of-the-Forest-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/7/The-Darkest-Part-of-the-Forest-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/5098091097090095/2-Magisterium-Le-gant-de-cuivre-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/2096097093097099/The-Coldest-Girl-in-Coldtown-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/8097099092/The-Golden-Tower-Magisterium-5-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/1096097098090096/Lucifer-Volume-1-Cold-Heaven-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/2095099090097096/Valiant-The-Modern-Faerie-Tales-2-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/3095094096090098/Geektastic-Stories-from-the-Nerd-Herd-by-Holly-Black.pdf
    • http://loaminoo.linkpc.net/2091094092091096/The-Coldes

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