PDF malware analysis — malicious · dafa707570b70a1b

MALICIOUS

PDF

5.1 KB

MD5: 114e98b8bef9602cf4016e3d6c927f32 SHA-1: f86837b80677a6be4640de26645c7f13d9712bf5 SHA-256: dafa707570b70a1b062366efc304a9872e219b5be443b2bd4cbef2bb51fdb86c

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 script, named 'javascript_obj687345_000.js', is likely responsible for downloading and executing a second-stage payload. The lack of readable document body text and the reliance on obfuscated scripts prevent a more specific family attribution.

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_obj687345_000.js` `3c804829f20058719c4a7c8d218f4b85436bc2a4b3577cadf7988c4aa8d7d06b`	pdf-javascript-stream	PDF /JS object 687345 at offset 0x135	8351 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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