PDF malware analysis — malicious · a8f0c42a32eec91c

MALICIOUS

PDF

4.3 KB

MD5: 01ba0342efc8d2f30222657b736eff41 SHA-1: 1cb1206be1256c06b0ed06d709bc128de560a2b5 SHA-256: a8f0c42a32eec91cceab36b3a1275875cf16db0c801950a1aafc716028206140

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 PDF_EVAL and PDF_FROMCHARCODE firings suggest that the JavaScript is obfuscated and uses eval() and String.fromCharCode() to execute arbitrary code. This obfuscated script, named 'javascript_obj142956_000.js', is likely designed to download and execute 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_obj142956_000.js` `d2163caae344f50f9dded54dff0b0089ea198e0b7331cf23903fdb0c16d9bf2d`	pdf-javascript-stream	PDF /JS object 142956 at offset 0x135	8291 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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