PDF malware analysis — malicious · dd436369cba4c192

MALICIOUS

PDF

16.1 KB Created: 2010-03-04 03:18:39 Authoring application: uHeQMIP4swoRW (via Br0yvLcjQFTBeU)

MD5: bb32b841b3ed2ab4ef94da590de79940 SHA-1: 43d3f45b1d68839d9c0b54b2229208b3b9e58fc2 SHA-256: dd436369cba4c192fc040ca6e275288b38c6e3b57e3c1e9bdcb3c8647e0a8b7c

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The JavaScript stream, named javascript_obj0007_000.js, is obfuscated and uses String.fromCharCode and eval() calls, suggesting it's designed to execute malicious code. The primary intent appears to be the execution of this obfuscated script, likely to download and run 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` `5e33973a08dc920533339db6cd1c3d0f0d06c48816eb9bbc67894146055f394a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23C	15285 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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