PDF malware analysis — malicious · d94e4a2496dbdeda

MALICIOUS

PDF

35.7 KB Created: 2010-03-07 19:18:41 Authoring application: kfYVOwe3puHpR (via bHwZ695Sk7D)

MD5: 6e110084a3efa3ecfda7ef6aeffc4efb SHA-1: 0bf0b0c64e6a3227b0941dbd7dd962f64f1d7236 SHA-256: d94e4a2496dbdedac1bdfdcad317d07bab3339354cd7d3579713cc3bdc4c10c0

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream is heavily obfuscated, utilizing String.fromCharCode and eval() calls, which are flagged by PDF_FROMCHARCODE and PDF_EVAL respectively. The primary intent appears to be downloading and executing a second-stage payload, as suggested by the obfuscated nature and the presence of an extracted JavaScript file. The file authoring metadata also appears suspicious.

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.
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_obj0007_000.js` `444a7cc098c7ae3ccdfac3aff0acaf6d095b3914ca6baec750cf7ebe1f2b6d3a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x245	35352 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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