PDF malware analysis — malicious · 92c8f69ecd4c20f7

MALICIOUS

PDF

37.8 KB

MD5: 02f5b7b7f7d0e09fede46242d76f516d SHA-1: 9a4406fd516ed78b86af6d0efb7954a12ffb43b5 SHA-256: 92c8f69ecd4c20f7e04fb0e18e793be19a83f4b5e5dcb1cc97317b24e9801e6d

124 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file exhibits multiple indicators of malicious activity, including embedded JavaScript and Flash content, as well as heuristic firings related to JavaScript actions and exploit indicators. The presence of an embedded JavaScript file, 'javascript_obj0006_000.js', suggests it is designed to execute malicious code. The ML classifier strongly flags this PDF as malicious, indicating a high likelihood of exploit or payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `ce5f7936cf8e3536a88a804ce2d6902022df1794fa878bdc64a26866e34ba989`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xB05	55839 bytes
`javascript_obj0006_000.js` `bf64af147bf56d5bdf91e22c26ac16f296786e692a6cb5879b157eb5b4390686`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF5	1654 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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