PDF malware analysis — malicious · e547d87c6f7bf227

MALICIOUS

PDF

4.0 KB

MD5: 474df995379643aac1ad09d25593b8bb SHA-1: c07b8ce703171976140e8b5613a57013b23307e7 SHA-256: e547d87c6f7bf227816b855000113b6ad4197a408fb5bb14526bd7628eaee547

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream is heavily obfuscated, as suggested by the PDF_EVAL and PDF_FROMCHARCODE firings and the 'Script obfuscation indicators' in the static triage. The obfuscated JavaScript likely performs actions such as downloading and executing a second-stage payload. The presence of 'acroform_b64_00.js' and 'javascript_obj0013_001.js' further supports the analysis of embedded scripts.

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_obj0013_001.js` `6389b0f0fcbc169d850bde84d4dd74af3d6a1b0eed6ab4c3114808316c682f2f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6181 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `13b1ee86b6acb9c59d3b3cd3edf07304f75482e679ddb10aebb136d7716fcf3a`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3483 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).

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