PDF malware analysis — malicious · a41e5bd9c74628ed

MALICIOUS

PDF

77.1 KB Created: 2010-03-07 07:18:34 Authoring application: IIFj74edu2Zt0S (via WkM0jTnnsKYsm)

MD5: 68ee5bf37f0467aad3beac6a97a19c28 SHA-1: 13318010f5764f255ce14da21f454b079eedf742 SHA-256: a41e5bd9c74628edefb45258b487d8dc21eea2741ffd757e368e4ae5e8bd2c45

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The high-severity PDF_EVAL firing suggests the script is obfuscated and uses eval() to execute its content. The extracted artifact javascript_obj0007_000.js is likely responsible for downloading and executing a second-stage payload. The file's metadata and verdict confirm its malicious nature.

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` `3c65e26fbf615f7fe32178ec0b1f3a22acfaf218ad1c3b426ec469aa5196eee3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x248	77737 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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