PDF malware analysis — malicious · e87f9185d15e8945

MALICIOUS

PDF

3.9 KB

MD5: 11b06e7b3b34181f20574bd1ca1b1663 SHA-1: 83da58343f3288d046fcdc1277d2c08d6b1ee242 SHA-256: e87f9185d15e89456c930e60d79f3d72fdca3708ed08467673f9f24a2bd16536

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 dynamic code execution. The extracted JavaScript files, 'javascript_obj111711_000.js' and 'javascript_obj111712_001.js', are likely responsible for downloading and executing a second-stage payload. The document body is unreadable, providing no further context.

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` `2f38e2a37db87cec3942a6d44cc41e3f39033d269ecb4292793540551a87ac18`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	4800 bytes
`javascript_obj111712_001.js` `100b399583afac0b1e9dd3b360ccefb0852de368eb5bceacc0d1e1ec4b45ea6c`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD98	516 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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