PDF malware analysis — malicious · 94c441316facded1

MALICIOUS

PDF

31.6 KB

MD5: 68d38e17a99860694c1f51404b6026ff SHA-1: 359afb977221c3a5a4d94d05a8505fe447e750e1 SHA-256: 94c441316facded10d67df8760a02880b97d25f73c2c20885ed14506627c1aa8

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript and a RichMedia (Flash) object, indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA heuristics. The embedded JavaScript stream, specifically 'javascript_obj0006_000.js' and its deobfuscated version 'legacy_pdfkit_stage_000.js', contains an eval() call, suggesting it's designed to execute further code. The presence of an embedded SWF file ('ZdhyXAVZwLWfPiH.swf') further supports the theory that this PDF is a dropper or exploit kit stage, aiming to download and execute a second-stage payload.

Heuristics 6

RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ZdhyXAVZwLWfPiH.swf` `767382813fc770c9716554c3266b22eee1636037ca964af05acf6ff66db4a27d`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x134B	26993 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `6ce8a365b5887c1ba77d8df7896931c78d3bbec167e2a84920dabd530370493b`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF9	3827 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `3bf935f6b40ecc3dc8fbf457a1f01171a946388d74bfb77fe20bd64b5daf136a`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xDB1	2465 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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