PDF malware analysis — malicious · 7d7b8c2d6305eff4

MALICIOUS

PDF

37.7 KB

MD5: 1f21b4eb9d75139192c0c6e91d4bf2a7 SHA-1: 5a0ff98792e0c4525d27fd10af74504598117c99 SHA-256: 7d7b8c2d6305eff471a110bbfa27266ee8dbdc00baa6e5c0c3c68eb461be3ec7

124 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1559.002 Component Object Model Hijacking T1204.002 Malicious File

The PDF file exhibits multiple high-severity heuristic firings, including embedded Flash (RichMedia) and JavaScript streams. The ML classifier strongly indicates maliciousness. The presence of an embedded SWF file and a JavaScript object suggests the document is designed to execute arbitrary code, likely for exploitation 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 0xAB9	55839 bytes
`javascript_obj0006_000.js` `aa2ca2c094bf5cff959dc9a1b67140d38c7386d76caa9fa0972a712ee92e2354`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF5	1558 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.