Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd479e4a8fefe33e…

MALICIOUS

PDF

1.6 KB Authoring application: LaTeX with hyperref and pdfscream (via dvips + Distiller)
MD5: a2ab490c44b9439ccf09e860a5df9f51 SHA-1: 87bf31dc070bd4119b8d948001222a294cdf45db SHA-256: bd479e4a8fefe33e48afc343750181be49c91046a2607919d4a57e6aa7eacd47
98 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript triggered by an OpenAction. The JavaScript stream includes an eval() call, indicating obfuscated code execution. This pattern is commonly used to download and execute a second-stage payload. The heuristics suggest JavaScript execution and obfuscation, pointing towards a malicious downloader.

Heuristics 5

  • OpenAction trigger high PDF_OPENACTION
    PDF has an /OpenAction that launches, submits, or opens an external target
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0001_000.js
bf432c266e4021f160a3eb7a8318c635f56428ebb11e0aa0546d3109cae945f5		 pdf-javascript-stream PDF /JS object 1 at offset 0xF 532 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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