PDF malware analysis — malicious · 0c26ecd779b42981

MALICIOUS

PDF

14.4 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: f05918ca77c898301633050b748a3458 SHA-1: cc78e7a620db6a6c3afe8e65505988fafc29c46d SHA-256: 0c26ecd779b42981915231c20fb5178a280f78e8cec08b02b97e5d3be952a67d

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. The embedded JavaScript, though obfuscated, is indicative of an attempt to exploit vulnerabilities and download a secondary payload, aligning with T1059.007. The overall behavior suggests it's likely delivered as a spearphishing attachment (T1566.001) to execute further malicious code (T1203).

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36166
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.
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.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `b8f1efcea4edf57de995838ea6c994bc4be5389ffdead3537ad3623b05582364`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74760 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.