PDF malware analysis — malicious · d5834115f58c74d4

MALICIOUS

PDF

11.5 KB

MD5: f55885a48aac3d099ab6bee9c01414a1 SHA-1: 3289ca61c92708e7f4242a2fe852d635e455b140 SHA-256: d5834115f58c74d4fa03b813e8f579a78fa67755faf2a4bc65c6d1bdfd58b1c7

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and a Flash object (exploit.swf), both of which are commonly used to exploit vulnerabilities. The ML classifier strongly indicates maliciousness. The embedded JavaScript stream, named 'javascript_obj0017_000.js', contains obfuscated code with eval() calls, suggesting it's designed to download and execute a secondary payload. The presence of a Flash object further supports an exploit-based attack vector.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`exploit.swf` `09da31fcb002129249bb529a7f84709739a96f62781db5f4c6d9bf6e4308eb15`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4D1	102 bytes
`javascript_obj0017_000.js` `20a3cb1c9f18cc29076bf1520ab0c91a76642553ad2ef0164f679ec816e49338`	pdf-javascript-stream	PDF /JS object 17 at offset 0x5EB	5835 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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