Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ee5191fe57efc4…

MALICIOUS

PDF

16.6 KB Created: 2019-06-04 08:19:43 +01:00 Authoring application: mPDF 5.7
MD5: f52c645713845963a2eec9b84970f461 SHA-1: 147138a5c8e40e1bdf8c9d6cff0c8d32a38459a6 SHA-256: 58ee5191fe57efc48ae0c1b8b03fc9aab57e4a20e1fa78fd1ec460049f0921f7
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample, and the document body contained obfuscated text and URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9810

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/5731739732738732/Clarkesworld-Magazine-Issue-61-Clarkesworld-Magazine-61-by-Neil-Clarke.pdf
    • http://cefasfese.4pu.com/2734738731735/Clarkesworld-Magazine-Issue-80-Clarkesworld-Magazine-80-by-Neil-Clarke.pdf
    • http://cefasfese.4pu.com/2734738730730/Clarkesworld-Magazine-Issue-37-Clarkesworld-Magazine-37-by-Neil-Clarke.pdf
    • http://cefasfese.4pu.com/1733736733732736/Clarkesworld-Magazine-Issue-100-Clarkesworld-Magazine-100-by-Neil-Clarke.pdf
    • http://cefasfese.4pu.com/2732733738730731/Clarkesworld-Magazine-Issue-7-Clarkesworld-Magazine-7-by-Neil-Clarke.pdf
    • http://cefasfese.4pu.com/2734737737731/Clarkesworld-Magazine-Issue-71-Clarkesworld-Magazine-71-by-Neil-Clarke.pdf
    • http://cefasfese.4pu.com/2734735732734/Clarkesworld-Magazine-Issue-121-Clarkesworld-Magazine-121-by-Neil-Clarke.pdf
    • http://cefasfese.4pu.com/5731732731733731/Clarkesworld-Magazine-Issue-101-Clarkesworld-Magazine-101-by-Neil-Clarke.pdf
    • http://cefasfese.4pu.com/2734738732735/Clarkesworld-Magazine-Issue-79-Clarkesworld-Magazine-79-by-Neil-Clarke.pdf
    • http://cefasfese.4pu.com/2737734732735737/Realms-The-First-Year-of-Clarkesworld-Magazine-by-Nick-Mamatas.pdf
    • http://cefasfese.4pu.com/8734739734732730/Belle-Armoire-Jewelry-Magazine-Single-Issue-Jun-Jul-Aug-2010-vol-6-issue-2-by-Amanda-Crabtree.pdf
    • http://cefasfese.4pu.com/2735739736733/Apex-Magazine-Issue-99-by-Amy-H-Sturgis.pdf
    • http://cefasfese.4pu.com/4730738732733739/Massacre-Magazine-Issue-5-by-Julia-Kavan.pdf
    • http://cefasfese.4pu.com/6737736736731739/Phobos-Magazine-Issue-One-Zugzwang-by-A-E-Decker.pdf
    • http://cefasfese.4pu.com/2734737735738/Apex-Magazine-Issue-50-by-Lynne-M-Thomas.pdf
    • http://cefasfese.4pu.com/1730735739737734734/Apex-Magazine-Issue-86-by-Jason-Sizemore.pdf
    • http://cefasfese.4pu.com/7739737733738739/Going-In-Depth-Magazine-December-2015-A-Genealogy-Magazine-for-ALL-Genealogists-Volume-35-by-Jennifer-Alford.pdf
    • http://cefasfese.4pu.com/1730732730732737734/Feverish-Fiction-Magazine-issue-3-by-Michael-Faun.pdf
    • http://cefasfese.4pu.com/6737736737732734/Phobos-Magazine-Issue-Two-Emergence-weird-fiction-by-Amanda-C-Davis.pdf
    • http://cefasfese.4pu.com/6734734735733732/Jahzara-Saphir-Magazine-July-August-2016-Issue-by-Princess-Keith.pdf

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