PDF malware analysis — malicious · be367ccb256cc37a

MALICIOUS

PDF

3.9 KB

MD5: cd7df756500dc88ade2be5a3b49d6db5 SHA-1: 40403e41af8ea5ea10bc52d55c3031037a1ea17c SHA-256: be367ccb256cc37aeab3aa9a66eb43cc32bea4129ae76e9036f98cc81c2ce9d1

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF document contains embedded JavaScript streams, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests that the JavaScript code is likely being used to execute arbitrary commands, potentially downloading and running a second-stage payload. The extracted file names 'javascript_obj123451_000.js' and 'javascript_obj123452_001.js' are included as IOCs.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj123451_000.js` `1443f1ea7b930a8035f6a40975cb23f618c167ef9a0ded0fd9cf8fb359764736`	pdf-javascript-stream	PDF /JS object 123451 at offset 0x197	258 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj123452_001.js` `18e5fdccd07c1cd76c1f11f42682873e1080ee729ccdaf5f7423b4b1abfa2a85`	pdf-javascript-stream	PDF /JS object 123452 at offset 0x269	5465 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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