PDF malware analysis — malicious · c01953640d9070dd

MALICIOUS

PDF

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

MD5: 3faa2f2db5660e8fad7a80356bd80f68 SHA-1: c8367d69bcac42e4aecbc713c3606a0dbe46acce SHA-256: c01953640d9070dd202132a10fe6ea39629a4ad2493a35734decb1ff0a171dbd

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 an eval() call and String.fromCharCode usage within the decoded stream suggests obfuscated code execution. This embedded JavaScript, found in 'javascript_obj0006_000.js', is likely responsible for downloading and executing a second-stage payload, a common technique for malware delivery.

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` `5e45cb5555f50651809e705d206ab4d3851c769ffc0673f234fce74f6197f5a4`	pdf-javascript-stream	PDF /JS object 6 at offset 0xB5	12531 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 7 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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