PDF malware analysis — malicious · a0f1e129d28ab275

MALICIOUS

PDF

54.2 KB

MD5: ddbf2a92a029336a0d7592ceb3e0ae0c SHA-1: 809a516cc6270e144b377cc94b328897da368c4e SHA-256: a0f1e129d28ab27569d7d11260f234b46191bc966a5eec6abc2d5393d15b3a33

124 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1559.002 Component Object Model Hijacking

The PDF file exhibits multiple indicators of malicious activity, including embedded JavaScript and a Flash object. The ML classifier strongly suggests maliciousness. The presence of these embedded artifacts points towards an attack pattern designed to leverage external exploits or scripts to compromise the user's system. The extracted JavaScript file and SWF object are key indicators of the delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 7

RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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
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
`Adobe.swf` `8c702f60d07ed3fe21053014a9ab550df3fd5b001b6f071ffedd8bb7b9881feb`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xAC9	52522 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.89, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `9f51cc265977dc53d3829ecc44499cc53575a7e9866a82a2c7dca89cc2875c38`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF5	1564 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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