PDF malware analysis — malicious · d2c473b5ccf7280b

MALICIOUS

PDF

5.1 KB

MD5: b1f2827448d13bbdd62eb0ada2616366 SHA-1: af460b88e785099b44183f2f1eb991aa6b2bdb8b SHA-256: d2c473b5ccf7280b9822121ba3b62c255d470d38917ffc74834db797da069272

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The eval() call and String.fromCharCode usage suggest obfuscation and dynamic code execution. The extracted artifact 'javascript_obj0695_000.js' is a strong indicator of a JavaScript-based attack. The primary function of the script appears to be downloading and executing a second-stage payload, though the exact details are obscured. The lack of specific IOCs beyond the script filename limits confidence in a more precise family attribution.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
JavaScript action low 1 related finding 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_obj0695_000.js` `51f5ba9637eaf5089050d839ccec71b19c14aaed4c5ba05eadde5165fa6aa219`	pdf-javascript-stream	PDF /JS object 695 at offset 0x136	8357 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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