PDF malware analysis — malicious · 7af1b9f31a556b93

MALICIOUS

PDF

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

MD5: 9b5f2c34aead5880670b71949a1166bc SHA-1: 9b996c350822ae45c00c716c1dc34b422c778572 SHA-256: 7af1b9f31a556b93cd73d94ccae009c1b7efea204ea6e23d5e848510bcf20b97

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36166) confirm its malicious nature. The large embedded JavaScript stream suggests it is responsible for downloading and executing a second-stage payload. The document body is unreadable, but the presence of JavaScript and the ClamAV detection strongly indicate a malicious intent.

Heuristics 4

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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `1e9e187ceabbdea202be2c44bb0cd4220de685271ff4a9b3f018531c3e70b1ee`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	76522 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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