PDF malware analysis — malicious · 10197018a7e0c5ee

MALICIOUS

PDF

31.2 KB

MD5: c77f5c600221635346762cbcff010c75 SHA-1: fa8fee1500ebae0d16c7625a61672fb5823e0d1a SHA-256: 10197018a7e0c5ee6e0b2b1e479e09762b3eb40176c635a77ef29542aa166a47

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript that is obfuscated but appears to be designed to load and execute an embedded SWF file. The ML classifier strongly indicates maliciousness, and the presence of both JavaScript and an embedded SWF points to a multi-stage attack. The embedded SWF is the primary artifact, likely containing the final payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
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
`TyPWoIJRMY.swf` `767382813fc770c9716554c3266b22eee1636037ca964af05acf6ff66db4a27d`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x11A2	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` `55b7ced36b08fad2e3aa1a8d7e2a8a990cd1d7ba5c11be5f2120302d620470b5`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF9	3417 bytes
`legacy_pdfkit_stage_000.js` `71327d7fa320432d02bef102091ac05fb3ace82a5690cfdb412bf7e9520b46af`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xDA7	2087 bytes

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