PDF malware analysis — malicious · 83170228d7ade07e

MALICIOUS

PDF

4.1 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 22e94883604cfc920df0dbd9bbb96a1e SHA-1: cd537580f8d5d4f28afd78d21af686c884af6685 SHA-256: 83170228d7ade07e44ee42e2b813914113123de7ad65798b40e0abc198e292c0

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, PDF_JS, and PDF_EVAL. The JavaScript stream is obfuscated and uses String.fromCharCode, suggesting an attempt to hide its malicious functionality. The primary purpose appears to be the execution of this obfuscated script, likely to download and run a second-stage payload. The extracted artifact 'javascript_obj0013_001.js' further supports the presence of script-based malicious activity.

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `8ebf7fed7ed91ac84a304fa01e37dfd892205a52aef89022d956e2102a48659d`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D2	12648 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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