PDF malware analysis — malicious · 1e1aabbd4851b036

MALICIOUS

PDF

2.9 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 0be8b3f644b0aa732f5ed258501bec91 SHA-1: a9ff712d78aafd35a49d78fe1cccbaa4f5a9ef39 SHA-256: 1e1aabbd4851b036a9a8bd9f557d95e4a926dabf1ff8a8174c0feb5dd88079c3

130 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript with high-confidence indicators of maliciousness, including eval() and unescape() calls, suggesting obfuscated code execution. The ML classifier strongly flagged this PDF as malicious. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for initial access.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
ClamAV scan did not complete on extracted artifact info CLAMAV_SCAN_INCOMPLETE

ClamAV did not complete on 1 carved artifact(s); EXTRACTED_FILE_CLAMAV may be missing for this run. The result is not cached so a later submission will retry the scan.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `e69c1e6f88fd2a0eb261d50f14bd282b228a68f8d60a0d286fa8c28459b24ea3`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36A	3246 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).

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