Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5dea72bc41dc47…

MALICIOUS

PDF

13.1 KB Created: 2019-05-02 18:05:08 +01:00 Authoring application: mPDF 5.7
MD5: 4547581b55310523170fb828abfe2b81 SHA-1: 945e760a282841905e54fd36d21f2c9d8458f6c5 SHA-256: 0a5dea72bc41dc4733d622f61ddcd9c7cc01fc2366a4247f779b049770712b06
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this document as malicious. While the specific intent of these linked PDFs is unclear, the sheer volume and the heuristic firing suggest a malicious purpose, likely related to driving traffic or distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9006

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://xiixmcuin.linkpc.net/3207203206204200/Yule-Be-Mine-by-Jennifer-LaBrecque.pdf
    • http://xiixmcuin.linkpc.net/1204204209207206/Murphy-s-Law-Law-2-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/2200202201202207/Buckhorn-Brothers-1-4-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/1207201209201208/No-Limits-Ultimate-1-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/1202203207204209/Treat-Her-Right-PI-amp-Men-To-The-Rescue-4-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/1202200209205205/Annie-Get-Your-Guy-Messing-Around-with-Max-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/4205204203200203/Real-Men-Last-All-Night-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/4207203208209204/Caught-In-The-Act-PI-amp-Men-to-the-Rescue-3-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/1204204209203200/Say-No-To-Joe-Visitation-North-Carolina-1-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/2202202208201203/Bare-It-All-Love-Undercover-2-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/2204202205205203/Tucker-Buckhorn-Brothers-9-5-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/1207203207201204/Hard-Knocks-Ultimate-0-5-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/1207201206205203/Heartbreakers-Treat-Her-Right-Mr-November-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/2204209206207200/Gabe-Buckhorn-Brothers-3-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/5204203/Holding-Strong-Ultimate-2-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/1207201208207208/Casey-Buckhorn-Brothers-5-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/4206200203201200/Fighting-Dirty-Ultimate-4-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/2204209206206206/Sawyer-Buckhorn-Brothers-1-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/2209207208206202/Driven-to-Distraction-Road-to-Love-1-by-Lori-Foster.pdf
    • http://xiixmcuin.linkpc.net/2202206205201200/Enticing-PI-amp-Men-to-the-Rescue-3-Buckhorn-Brothers-5-by-Lori-Foster.pdf

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