PDF malware analysis — malicious · ad8bdbfd47374f27

MALICIOUS

PDF

68.5 KB Created: 2010-03-05 03:18:38 Authoring application: G9Qh4i (via yTGMtKwDKXB)

MD5: 7b6261d25eeae0d9f6d3205e3057f87c SHA-1: c6dddd07431a87ac6624e8b0f6c668a8f1fd4098 SHA-256: ad8bdbfd47374f279cbca1512af8bfc21d7bb0f4d3c1c42d407809f26a7adbd4

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 the JavaScript is obfuscated and uses eval() to execute, a common technique for hiding malicious code. The extracted JavaScript file, javascript_obj0007_000.js, is likely responsible for downloading and executing a second-stage payload. The obfuscation and use of eval() make it difficult to determine the exact payload or delivery mechanism without further analysis.

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` `00c346bd99e7e2d0fb3c643296b86a52b70a3959d2947d39cea57c2111328693`	pdf-javascript-stream	PDF /JS object 7 at offset 0x240	68888 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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