PDF malware analysis — malicious · b98c3706f80cfcab

MALICIOUS

PDF

3.7 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 7c8592d7741fb6419c94494c4b2a593e SHA-1: 51980425b2c065c054fe1a3f35160470ff3dac7d SHA-256: b98c3706f80cfcab09b30f3d7a9519d4be2bd08c7c7dc53fa96403466722317f

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation. The heuristics suggest this JavaScript is designed to execute malicious code, likely downloading and running a second-stage payload. The presence of a large, obfuscated JavaScript stream further supports this. No specific malware family could be confidently identified.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
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_obj0014_000.js` `dff768471e2eefd3bb25aff6caae3554bb35035305bcaccbeba9083aaeb518c7`	pdf-javascript-stream	PDF /JS object 14 at offset 0x368	30555 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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