PDF malware analysis — malicious · 379aec8d8dbb60a5

MALICIOUS

PDF

18.0 KB Created: 2010-03-07 15:18:27 Authoring application: trqO9S6eEL8bu (via vtx2TNrM6kR)

MD5: 2d4f248d59f0d0261a8ba34eb52782b2 SHA-1: fcec7a1e3eb85ecaa6efb25b736aa54bb176e9f2 SHA-256: 379aec8d8dbb60a555e337448f79c8a92a47355064ab094bcf8b28f5edde5526

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL heuristic firing suggests that the JavaScript code is obfuscated and uses eval() to execute it. The extracted artifact 'javascript_obj0007_000.js' is likely the source of this obfuscated code. The primary function of this script appears to be downloading and executing a second-stage payload, which is a common technique for malware delivery. The confidence is moderate due to the obfuscation and lack of specific indicators for a known family.

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` `89571ba2a238fd8a598067b1f5fd39d2beb66e4a859716734fecd0693b946c76`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23F	17253 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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