PDF malware analysis — malicious · 508898a9b80cb344

MALICIOUS

PDF

6.1 KB Created: 2008-09-07 22:47:39 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12; modified using iText 2.1.7 by 1T3XT)

MD5: d067e968291cc752543729bf62fbf78f SHA-1: 25b68c8a1fa2716f81f1de35e8ae843cd67ddf4c SHA-256: 508898a9b80cb344cdc9d5298f9a9d77b2e556cce29f4149c27193e1c31b20e4

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV detection for 'Pdf.Exploit.CVE_2009_0927-1' strongly indicates exploitation of this specific vulnerability. The presence of embedded JavaScript streams, along with heuristics for JavaScript actions and String.fromCharCode, confirms the use of scripting for malicious purposes. The ML classifier's high score further supports the malicious nature. The extracted JavaScript artifacts, though obfuscated, are consistent with a downloader attempting to execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.CVE_2009_0927-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.CVE_2009_0927-1
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.
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.
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_001.js` `c509d242254a276bf868837972d7677821b64e2aed4497e562805bc5a0ea61b0`	pdf-javascript-stream	PDF /JS object 13 at offset 0x352	4717 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0013_002.js` `47349111f86bbb0acedf582859d67e15734d797b71d91ce5d75a54d68064f9af`	pdf-javascript-stream	PDF /JS object 13 at offset 0x372	5413 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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