Malicious PDF — malware analysis report

Static analysis result for SHA-256 1147ae34992ab2be…

MALICIOUS

PDF

19.7 KB Created: 2020-02-13 22:48:09 +00:00 Authoring application: mPDF 5.7
MD5: 61ccd882d19173023fa5a181948d8c35 SHA-1: 13fbc3b5ebe94dbfe9cc23f821c7a121678ea45c SHA-256: 1147ae34992ab2be8bcb7fdaaa1d1874f825ac8d728812cf7e9e3dff3d3c615a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged the document as malicious. The embedded URLs are likely intended to direct users to external sites, potentially for SEO manipulation or to serve malicious payloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://calistazz.myhome.cx/6864860869862865/David-McCullough-on-Harry-S-Truman-Character-Above-All-2-by-David-McCullough.pdf
    • http://calistazz.myhome.cx/3863865865861/1776-by-David-McCullough.pdf
    • http://calistazz.myhome.cx/4864867861860868/The-Path-Between-the-Seas-by-David-McCullough.pdf
    • http://calistazz.myhome.cx/7862865865866865/Who-Were-the-Wright-Brothers-by-James-Buckley-Jr-.pdf
    • http://calistazz.myhome.cx/4860864864869860/The-Wright-Brothers-by-Quentin-Reynolds.pdf
    • http://calistazz.myhome.cx/8861865865863863/The-Greater-Journey-Americans-in-Paris-by-David-McCullough.pdf
    • http://calistazz.myhome.cx/2868868862869865/Think-on-Death-Ziza-Todd-1-by-David-Willis-McCullough.pdf
    • http://calistazz.myhome.cx/7861866861861864/From-Ground-to-Air-with-the-Wright-Brothers-by-Deborah-Hedstrom.pdf
    • http://calistazz.myhome.cx/5864866864864/Branded-The-Cavanaugh-Brothers-1-by-Laura-Wright.pdf
    • http://calistazz.myhome.cx/1863868861863/The-Wright-Brothers-How-They-Invented-the-Airplane-by-Russell-Freedman.pdf
    • http://calistazz.myhome.cx/4868861860864862/In-the-Dark-Streets-Shineth-A-1941-Christmas-Eve-Story-by-David-McCullough.pdf
    • http://calistazz.myhome.cx/6868864866863/To-Conquer-the-Air-The-Wright-Brothers-and-the-Great-Race-for-Flight-by-James-Tobin.pdf
    • http://calistazz.myhome.cx/3867863868864867/Science-Comics-Flying-Machines-How-the-Wright-Brothers-Soared-by-Alison-Wilgus.pdf
    • http://calistazz.myhome.cx/6864860868868869/Wars-of-the-Irish-Kings-A-Thousand-Years-of-Struggle-from-the-Age-of-Myth-through-the-Reign-of-Queen-Elizabeth-I-by-David-Willis-McCullough.pdf
    • http://calistazz.myhome.cx/5867865866862860/Mornings-on-Horseback-The-Story-of-an-Extraordinary-Faimly-a-Vanished-Way-of-Life-and-the-Unique-Child-Who-Became-Theodore-Roosevelt-by-David-McCullough.pdf
    • http://calistazz.myhome.cx/2862862860866862/The-Great-Bridge-The-Epic-Story-of-the-Building-of-the-Brooklyn-Bridge-by-David-McCullough.pdf
    • http://calistazz.myhome.cx/9868860861864861/The-Great-Bridge-The-Epic-Story-of-the-Building-of-the-Brooklyn-Bridge-by-David-McCullough.pdf
    • http://calistazz.myhome.cx/6869862861862867/Spartacus-by-David-Wright.pdf
    • http://calistazz.myhome.cx/5861861860861865/Downs-The-History-of-Disability-by-David---Wright.pdf
    • http://calistazz.myhome.cx/8864864860860863/5-Minute-Mindfulness-Simple-Daily-Shortcuts-to-Transform-Your-Life-by-David-B-Dillard-Wright.pdf

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