Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c4f22d0b52bf40…

MALICIOUS

PDF

12.6 KB Created: 2019-04-30 05:06:29 +01:00 Authoring application: mPDF 5.7
MD5: e714bbbc31182557c4739425538ba508 SHA-1: 6a8cdbbbbce856d019ef7ff1cb7599096771afbb SHA-256: 59c4f22d0b52bf40b8fa0755233843f50fc7154817729106b0c9b499c19cfdde
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 as a link farm, which is a common technique for SEO manipulation or distributing malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was unreadable, so the primary attack vector is the link farm. The links themselves are currently marked as benign, but the sheer volume and the heuristic firing suggest a malicious intent behind their distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8780

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/1094098093094097/Pure-Covenant-2-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/3092092093093099/Pure-Covenant-2-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/6095093091093099/Pure-Covenant-2-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/3093093092098/Deity-Covenant-3-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/2091093091091095/Daimon-Covenant-0-5-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/6095093091094096/Apollyon-Covenant-4-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/4099098096096090/Elixir-Covenant-3-5-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/3094090096092/Elixir-Covenant-3-5-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/6095093090090091/Half-Blood-Covenant-1-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/7093098090091/Half-Blood-Covenant-1-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/3092098093090/Half-Blood-Covenant-1-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/4096094094090/Opposition-Lux-5-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/4098093093092094/Shadows-Lux-0-5-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/3092094090096/Obsidian-Lux-1-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/4090091097093096/Oblivion-Lux-1-5-2-5-3-5-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/4096094093098/Don-t-Look-Back-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/3090097091099/Onyx-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/5090090097090093/Obsidian-Lux-1-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/6095092099095095/Obsidian-Lux-1-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/6094091095/If-There-s-No-Tomorrow-by-Jennifer-L-Armentrout.pdf
    • http://loaminoo.linkpc.net/4096094094090/Opposition-Lux-5-by-Jennifer-L-Armen

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