Malicious PDF — malware analysis report

Static analysis result for SHA-256 363097d2d8968e8e…

MALICIOUS

PDF

19.3 KB Created: 2019-05-03 06:07:38 +01:00 Authoring application: mPDF 5.7
MD5: fdeb2cc22781368f1be00cbc32bce370 SHA-1: 917656302e92f5cc5742d7b74c28a6125ba31b29 SHA-256: 363097d2d8968e8ecf3e91727a2bc93e2c37ca34a94ac27d57fc6d86b99ccc05
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 sheer volume and the heuristic firing of 'PDF_SEO_LINK_FARM' suggest a malicious intent, possibly for SEO poisoning or to act as a distribution point for other malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily corrupted, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/9736739736733/The-Wires-in-My-Sister-s-Head-by-Sally-Ann-Chan.pdf
    • http://cefasfese.4pu.com/4736735730738731/Sister-Heart-by-Sally-Morgan.pdf
    • http://cefasfese.4pu.com/1731737733732734/From-Poor-Migrant-to-Millionaire-Chan-Wing-1873-1947-by-King-Nui-Chan.pdf
    • http://cefasfese.4pu.com/6731737732738732/The-Francis-Chan-Collection-Crazy-Love-Forgotten-God-Erasing-Hell-and-Multiply-by-Francis-Chan.pdf
    • http://cefasfese.4pu.com/7731738737735/Ghost-in-the-Wires-My-Adventures-as-the-World-s-Most-Wanted-Hacker-by-Kevin-D-Mitnick.pdf
    • http://cefasfese.4pu.com/7736732732730736/Martov-And-Zinoviev-Head-To-Head-In-Halle-by-November-Publications.pdf
    • http://cefasfese.4pu.com/6735730733735/I-Am-Jackie-Chan-My-Life-in-Action-by-Jackie-Chan.pdf
    • http://cefasfese.4pu.com/8737739733735/Hot-Head-Head-1-by-Damon-Suede.pdf
    • http://cefasfese.4pu.com/1730734736735/Hot-Head-Head-1-by-Damon-Suede.pdf
    • http://cefasfese.4pu.com/9731736739731/I-Have-a-Sister--My-Sister-Is-Deaf-by-Jeanne-Whitehouse-Peterson.pdf
    • http://cefasfese.4pu.com/4737739734730732/Sister-Light-Sister-Dark-by-Jane-Yolen.pdf
    • http://cefasfese.4pu.com/1731736735737732/Stuck-in-the-Middle-Sister-to-Sister-1-by-Virginia-Smith.pdf
    • http://cefasfese.4pu.com/1732735733732731/The-Other-Sister-Sister-Series-1-by-Leanne-Davis.pdf
    • http://cefasfese.4pu.com/4733734739731733/Death-s-Head-Maximum-Offense-Death-s-Head-2-by-David-Gunn.pdf
    • http://cefasfese.4pu.com/4738738730739733/The-George-Carlin-Letters-The-Permanent-Courtship-of-Sally-Wade-by-Sally-Wade.pdf
    • http://cefasfese.4pu.com/1735735735734739/Dragon-Head-Volume-1-Dragon-Head-1-by-Minetar-Mochizuki.pdf
    • http://cefasfese.4pu.com/6735736733734731/The-Secret-History-of-the-Calves-Head-Club-or-the-Republican-Unmask-d-With-a-Large-Continuation-and-an-Appendix-to-the-History-Wherein-Is-Fully-Shewn-the-Religion-of-the-Calves-Head-Heroes-in-Their-Anniversary-Thanksgiving-Songs-on-the-30th-of-Janua-by-Edward-Ward.pdf
    • http://cefasfese.4pu.com/6735733730734730/Big-Sister-Little-Sister-by-LeUyen-Pham.pdf
    • http://cefasfese.4pu.com/3734735732731736/The-Sister-Circle-The-Sister-Circle-Series-1-by-Vonette-Bright.pdf
    • http://cefasfese.4pu.com/4736733733735730/Sister-Sister-by-Sue-Fortin.pdf
    • http://cefasfese.4pu.com/9731736739731/I-Have-a-Sister--My-Siste

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