PDF malware analysis — malicious · 7c73fc948a5fe335

MALICIOUS

PDF

14.5 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 18def2d2d57ff221d314aee5bffb98c1 SHA-1: ecdb45e76a1a6049b870294278c60a0a310755de SHA-256: 7c73fc948a5fe33567a20eec42b91d68e8abfa6845bdf4cf26d72acda8a2eee2

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript that utilizes an eval() call, indicating obfuscated code execution. Heuristics and ClamAV detection confirm this is a malicious PDF exploiting a known vulnerability. The embedded JavaScript streams, javascript_obj0013_000.js and javascript_obj0013_001.js, are the primary indicators of malicious activity, likely serving to download and execute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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.
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
`javascript_obj0013_000.js` `2dc44d0e87d64f985ac0a7af6539b3b90a1a7394d32fb340bdf48fc8136a70ef`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13319 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj0013_001.js` `73cd0c77cf526fcb0b8f59f448e0ccc0370b7c90183f86dda4f0521578a599e3`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14025 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).

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