PDF malware analysis — malicious · c875f0e6eef2da01

MALICIOUS

PDF

37.7 KB

MD5: 00ce51d8e68d69d70bfe1d14df64cf5f SHA-1: ac9f8ee76d3c0d6e16a26cd0ea58796c5f632524 SHA-256: c875f0e6eef2da01fd393f252aeb1b5935106a59fb91ddac82b370db3e2cb0a5

124 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and Flash content, indicated by PDF_JAVASCRIPT, PDF_JS, and PDF_RICHMEDIA heuristics. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript file, 'javascript_obj0006_000.js', is likely responsible for executing the malicious payload, potentially exploiting vulnerabilities within the PDF reader or delivering further malware. The presence of ASCIIHexDecode with exploit indicators further supports this. The overall attack pattern suggests a delivery mechanism for malicious code.

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 0xACF	55839 bytes
`javascript_obj0006_000.js` `c45458e6f8fc2c46b7b38f91fd990591e45271a714b600bc311080131db711cf`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF5	1594 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.