PDF malware analysis — malicious · d168bb20b9260abe

MALICIOUS

PDF

2.7 KB Created: 2008-12-17 23:30:58 UTC

MD5: 6992862aff60f70abea17fb3d2a9d216 SHA-1: 048cb0d48d1100f39d1c214ef56690874e960806 SHA-256: d168bb20b9260abe829ba91079218dfaf3e5669d600781f57ade261506ed73ba

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 presence of a PDF_EVAL heuristic firing suggests that the JavaScript code is being executed dynamically, likely to download and run a secondary payload. The obfuscated nature of the JavaScript, as hinted by the 'Script obfuscation indicators' triage signal, further supports this. No specific family could be identified, and the document body was unreadable.

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. (matched inside decoded stream)
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_obj0006_000.js` `3faf677bd2ae543cfd7f3afb7bb3dbf0d15cb65339d33f28d70fd19d9d1c4cea`	pdf-javascript-stream	PDF /JS object 6 at offset 0xB5	10071 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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