Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c5324e81f5962e…

MALICIOUS

PDF

18.3 KB Created: 2019-05-02 17:20:24 +01:00 Authoring application: mPDF 5.7 First seen: 2021-10-12
MD5: ba3f0823839eee074905d76a226ad9e2 SHA-1: 62d1be9917aea698372cfcb1c8b35f0c2761c89c SHA-256: b8c5324e81f5962e40d6027cd106f189fa647c87ce430dd8bc30cdff38e9cec7
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, suggesting a link farm or redirection scheme designed to lead users to external content. The ML classifier strongly indicated maliciousness, and the PDF structure itself is flagged for containing numerous external links. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact 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://kiteeearpdf.myhome.cx/3f211f214f213f218f216/Sharpe-s-Rifles-Sharpe-6-by-Bernard-Cornwell.pdf In PDF document text
    • http://kiteeearpdf.myhome.cx/4f211f212f211f218/Sharpe-s-Rifles-Sharpe-6-by-Bernard-Cornwell.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/1f210f211f219f214f217f216/Sharpe-s-Skirmish-Richard-Sharpe-and-the-Defence-of-the-Tormes-August-1812-Sharpe-14-5-by-Bernard-Cornwell.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/1f211f210f216f216f210f218/Sharpe-s-Regiment-Richard-Sharpe-and-the-Invasion-of-France-June-to-November-1813-by-Bernard-Cornwell.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/1f211f210f216f216f210f219/Sharpe-s-Honor-Richard-Sharpe-and-the-Vitoria-Campaign-February-to-June-1813-by-Bernard-Cornwell.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/8f210f217f213f218/Sharpe-s-Eagle-Sharpe-8-by-Bernard-Cornwell.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/2f210f219f219f216f211/Sharpe-s-Eagle-Sharpe-8-by-Bernard-Cornwell.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/1f214f219f210f218f214/Sharpe-s-Triumph-Sharpe-2-by-Bernard-Cornwell.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/1f214f219f213f219f216/Sharpe-s-Battle-Sharpe-12-by-Bernard-Cornwell.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/1f214f210f218f219f210/Sharpe-s-Escape-Sharpe-10-by-Bernard-Cornwell.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/6f215f218f212f218/Sharpe-s-Gold-Sharpe-9-by-Bernard-Cornwell.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/4f215f212f217f215f210/Sharpe-s-Havoc-Sharpe-7-by-Bernard-Cornwell.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/1f215f211f214f212f216/Sharpe-s-Ransom-by-Bernard-Cornwell.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/6f219f219f219f219f211/Sharpe-s-Enemy-Richard-Sharpe-and-the-Defense-of-Portugal-Christmas-1812-by-Bernard-Corwell.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/6f218f214f219f218f215/Meurtre-Heron-s-Cove-T1---S-rie-Emma-Sharpe-et-Colin-Donovan-Emma-Sharpe-amp-Colin-Donovan-by-Carla-Neggers.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/3f210f213f213f213f216/The-Throwback-by-Tom-Sharpe.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/1f217f212f217f215f213/Porterhouse-Blue-by-Tom-Sharpe.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/9f214f214f217f219/Indecent-Exposure-by-Tom-Sharpe.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/3f219f215f214f218f210/Back-in-Service-by-Isabel-Sharpe.pdfIn PDF document text
    • http://kiteeearpdf.myhome.cx/1f217f218f217f210/The-Sleeping-Father-by-Matthew-Sharpe.pdfIn PDF document text

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