PDF malware analysis — malicious · 891956fd1c191870

MALICIOUS

PDF

7.1 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: bc0ccc8b8ebea30fee22d04426164815 SHA-1: eae0c46e6713cc2c1dd6430f6330510dafaa1d79 SHA-256: 891956fd1c1918704a32c2d0ad2ff88e067af174d8a16a99256e606b82a54558

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1027 Obfuscated Files or Information T1204.002 Malicious File

The PDF file contains embedded JavaScript with multiple eval() calls, indicating obfuscation and malicious intent. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF exploiting a known vulnerability. The JavaScript is heavily obfuscated, but the presence of eval() and string concatenation suggests it is designed to download and execute a second-stage payload. The extracted artifact name 'javascript_obj0013_001.js' is included as an IOC.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-35587 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35587
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `0655dd57f1b97b5f7ff246696f7e007b477b7adc41dda2803638f1eaa7e4a8a1`	pdf-javascript-stream	PDF /JS object 13 at offset 0x38E	5732 bytes
Detection ClamAV: Pdf.Exploit.Agent-35587 Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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