Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d9a7149976c60f…

MALICIOUS

PDF

15.1 KB Created: 2019-05-02 04:53:17 +01:00 Authoring application: mPDF 5.7
MD5: b39a3dddf04ae9b3e2bcad9085b9a58d SHA-1: 4a10b87822caf9e606c114cd044334d717f9d860 SHA-256: 19d9a7149976c60f7de8cf5be2a3e6820dcfbab54ae4c44adc4ab6e9daf774ae
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/2739736731739732/The-Elusive-Bride-Black-Cobra-Quartet-2-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/1733734739734731/The-Brazen-Bride-Black-Cobra-Quartet-3-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/2739736732731738/The-Brazen-Bride-Black-Cobra-Quartet-3-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/3734739730735734/A-Buccaneer-at-Heart-The-Adventurers-Quartet-2-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/2739736732738731/The-Reckless-Bride-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/1733735735739732/The-Ideal-Bride-Cynster-11-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/7739731739739/Scandal-s-Bride-Cynster-3-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/3738736734731733/Scandal-s-Bride-Cynster-3-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/2731736732739734/Bride-Quartet-Collection-Savour-The-Moment-A-Bed-Of-Roses-Vision-In-White-Bride-Quartet-1-4-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/5733738735738731/The-World-of-Stephanie-Laurens-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/2736737733736739/The-Lady-Risks-All-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/2730734732735738/The-Lady-By-His-Side-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/3739735736737733/It-Happened-One-Season-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/7732733737735733/Regency-Revels-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/7737739730736/All-About-Passion-Cynster-7-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/1731736736732738/Hero-Come-Back-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/1733735731734733/Beyond-Seduction-Bastion-Club-6-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/5738738731736732/The-Seduction-of-Sebastian-Trantor-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/7737732731732/The-Promise-in-a-Kiss-Cynster-0-5-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/8739737736736737/Ein-s-es-Versprechen-Roman-by-Stephanie-Laurens.pdf
    • http://cefasfese.4pu.com/5733738735738731/The-World-of-Stephanie-

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