PDF malware analysis — malicious · 1ede8dfd7fa90352

MALICIOUS

PDF

3.8 KB

MD5: 9c7a76f50ec793fcbb0379913a19b8ae SHA-1: 0e7826b4a2b092a958ad2ae915ed4fb6ca2db484 SHA-256: 1ede8dfd7fa903528d83f7fc6352bc9048853bd06f82edae880213a5de375d4a

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The presence of an eval() call and String.fromCharCode suggests the script is likely obfuscated and designed to execute arbitrary code. The extracted artifact 'javascript_obj111712_001.js' is also suspicious. The primary attack pattern involves leveraging JavaScript execution within the PDF to achieve malicious objectives, likely downloading and executing a secondary payload.

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_obj111711_000.js` `f7e74e749450f40529b123e456bec1835771adf4fb9a9b671aa345298826e66f`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	4796 bytes
`javascript_obj111712_001.js` `cf7e85084a6d8ed6312a889722fad1c283f94a563a721096c49a2d1efe0f21c5`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD43	540 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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