PDF malware analysis — malicious · ad259f085c10e111

MALICIOUS

PDF

23.2 KB Created: 2010-07-25 10:32:51 Authoring application: FPDF 1.6

MD5: 343f833452d9520074a67731fa4f1e23 SHA-1: 49a58c4348c30cf2b47e908f081aae1a30b7cb50 SHA-256: ad259f085c10e111d6d620e9edf4f3abd3ff79ed6d3c16969e748266d902f46a

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_FROMCHARCODE, and PDF_EVAL. The `eval()` call within the JavaScript stream suggests obfuscated code execution. The extracted artifact `javascript_obj0007_000.js` is also flagged as suspicious due to script obfuscation. This points to a likely attack pattern where the PDF serves as a dropper for malicious JavaScript, which in turn is expected to download and execute a second-stage payload.

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` `e3192c3012577051fc61d57a5f1a5ad818737e1fce197dc2b07df56b4cf4b4a5`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1EB	22890 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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