PDF malware analysis — malicious · b25b482c7fb1bd30

MALICIOUS

PDF

4.3 KB

MD5: c7e36d52ecafb843faeaec8e0c46604c SHA-1: 376074ec39e0ae99f2ef32a34a78fc80a77b287c SHA-256: b25b482c7fb1bd30f4870f55edb86e6026c7cf9dc430a3180ba005c59f113f2a

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript/JScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL and PDF_FROMCHARCODE firings suggest that the JavaScript is obfuscated and uses eval() and String.fromCharCode() for execution. This obfuscated script, named 'javascript_obj6038_000.js', is likely responsible for downloading and executing a secondary payload. Due to the obfuscation, the exact nature of the payload and its ultimate destination cannot be determined with high confidence.

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_obj6038_000.js` `ed706317741e9af979eb71388e356180c5f295c35781eacbbdf8a4fd990da209`	pdf-javascript-stream	PDF /JS object 6038 at offset 0x133	8309 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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