PDF malware analysis — malicious · 30436b6cb71c9f2f

MALICIOUS

PDF

77.1 KB Created: 2010-03-11 23:19:02 Authoring application: e5GMpSrt6L (via pfVg6X3OQtn)

MD5: 7d0fa324e1989740b88fb8b858b575a4 SHA-1: c7a1c238bc53d0f4224f564dcc2d848087b59921 SHA-256: 30436b6cb71c9f2fb3cdecfe39b32671bb8c008ae9e6d84e73a8fc977ea9761c

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 a high-confidence PDF_EVAL call. The JavaScript stream is obfuscated and appears to use String.fromCharCode and eval() to execute its code. This suggests the script's purpose is to download and execute a second-stage payload. No document body text was available for analysis, and the script itself was too obfuscated to determine its exact actions or reconstruct specific IOCs beyond the embedded artifact name.

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` `36229bc15c8283a9bae7a1b66d6028173a41403683e3b2f29379e5cf8fa8cf4c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x243	77702 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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