PDF malware analysis — malicious · 5170400d2c327604

MALICIOUS

PDF

37.7 KB

MD5: b56576418f1cf929d533462c6b9d9d8a SHA-1: e851170ffc1c5b23d34e1d0745f3ae330b381413 SHA-256: 5170400d2c327604443408e8f3cc40e2179fddc71aff79b96c0a0782fbdf556a

124 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript and a RichMedia (Flash) object, strongly indicating malicious intent. The ML classifier also flagged this PDF with high confidence. The presence of embedded files and JavaScript streams suggests the file is designed to execute code or exploit vulnerabilities upon opening. The primary IOCs are the embedded JavaScript file and the SWF object.

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 0xAA7	55839 bytes
`javascript_obj0006_000.js` `a4aee18a1ae9be857b0b8e4428176c2910801c64d276d2fd9ac74b53304823ca`	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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