PDF malware analysis — malicious · 3304af0c9f8d6575

MALICIOUS

PDF

6.5 KB Authoring application: Jganbo

MD5: 7cb9134c509502a29d9a716e2fac108b SHA-1: ed3344c3d280c349130f12d1ef6b4670b4f266aa SHA-256: 3304af0c9f8d6575ef92f2dbfb452113e2ce3fa180261a45bc522b2a8a9cc466

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream, identified as javascript_obj0018_000.js, appears to be obfuscated, as suggested by the 'Script obfuscation indicators' finding. The primary function of this script is likely to download and execute a second-stage payload, a common technique for malware delivery.

Heuristics 5

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0018_000.js` `0215209a3dfc72e24e7938bd14a8460ba55a7aa4741bef2305cbdc08fc49e393`	pdf-javascript-stream	PDF /JS object 18 at offset 0x15AA	363 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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