PDF / .SWA malware analysis — malicious · cc49fc118be473a0

MALICIOUS

PDF / .SWA

11.5 KB Created: 2010-09-09 00:54:13 +04:00 Authoring application: pVuIM_ (via 883fb98c5)

MD5: 6adf49a889ba388133065a9d94148fb6 SHA-1: 009a14cad952e45d2f5b59c183644b30c449e5ec SHA-256: cc49fc118be473a0327f23dabe767ae4d874333cb9495576858361cc3cbd5e20

74 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The 'eval()' call and 'String.fromCharCode' usage suggest the script is obfuscated and designed to execute arbitrary code. The extracted JavaScript files are likely responsible for the malicious payload delivery. The file's metadata indicates it was authored by 'pVuIM_' which is a known component of certain exploit kits.

Heuristics 6

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)
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0011_000.js` `5ccec115a920bfb9f4028eef67853f508f7443086380af398801fd05e7d47b44`	pdf-javascript-stream	PDF /JS object 11 at offset 0x2490	1130 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0013_001.js` `4937a6448b8a89c713ab4e33f2cea7bb38e16d0537c49f055f881c8aaa137ac9`	pdf-javascript-stream	PDF /JS object 13 at offset 0x2725	499 bytes
`javascript_obj0015_002.js` `263e2d4508bedab1ebfdf23d817b0ce84d648e373227deb5ca5d56cc0e15f42b`	pdf-javascript-stream	PDF /JS object 15 at offset 0x28CF	134 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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