PDF malware analysis — malicious · 456a968f45d9d161

MALICIOUS

PDF

35.5 KB Created: 2010-03-07 22:20:59 Authoring application: iUJAC7jMvwSC (via XwmE5)

MD5: 8f32f489d08090d813cd0b1c3612229e SHA-1: 07adfb69881f7552ebf003e866e6045dad76ec57 SHA-256: 456a968f45d9d1619122e256796ca98141ccf1a0516d52ee6f655b4c91397f63

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by the 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 function of the script appears to be downloading and executing a second-stage payload, as suggested by the suspicious extracted artifact name 'javascript_obj0007_000.js'. The obfuscation and use of `eval()` are common techniques for evading static analysis and delivering malicious content.

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` `fe3a8d8f18c973d2d5975450c34dad464cbde98de68d7223e2b0af53498945d4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x248	35139 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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