Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e06116c14ae6939…

MALICIOUS

PDF

4.0 KB
MD5: 9bb86b8e84745ff3c19e4ee9a4d70094 SHA-1: c7304613621c33bc038d0b21ee545f8242b82cf4 SHA-256: 9e06116c14ae69392e826aaa48f252bb07b5341524e595b6140a458a35a8860f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, which is heavily obfuscated using eval() and String.fromCharCode. The heuristics indicate that this script is designed to download and execute a second-stage payload. The presence of multiple JavaScript-related heuristics and the extracted JavaScript files strongly suggest malicious intent, likely for malware delivery.

Heuristics 5

  • 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.
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0013_001.js
54c0b190c93d2c25ace2715ed07e80d90c294013a52d80245d03daba785cbcdd
pdf-javascript-stream PDF /JS object 13 at offset 0x368 6325 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
acroform_b64_00.js
f58c32cec8fbd42c951ca7ce6dbc0c3061a1c22e45c77a0611bf89930b4eb009
deobfuscated-js PDF AcroForm base64 (decompressed) at offset 0x99D 3589 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).