PDF malware analysis — malicious · 8ed7620ef52b9eca

MALICIOUS

PDF

37.8 KB

MD5: f0cc481915e90798384acda8a4c2321a SHA-1: a7b73f1749c767d0fecd40ee1968390b89f32d49 SHA-256: 8ed7620ef52b9eca6ac81f135bdc6bf8b9aa7403fe7b8d2494ea4bed3b3cb7e9

124 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file exhibits multiple indicators of malicious activity, including embedded JavaScript and a Flash object. The ML classifier strongly flagged this PDF as malicious. The presence of embedded JavaScript, specifically 'javascript_obj0006_000.js', suggests an attempt to execute code within the user's environment, likely for further exploitation or payload delivery. The embedded SWF file also points towards a potential exploit vector.

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 0xB01	55839 bytes
`javascript_obj0006_000.js` `01a4b986deea52c442a0e2615f968fd6ae7c637b48c7e6f54fdfd24c7315289e`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF5	1636 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.