PDF malware analysis — malicious · 7cfea2c3d628e326

MALICIOUS

PDF

4.7 KB Created: 2002-03-27 12:02:13 Authoring application: Aladdin Ghostscript 5.10

MD5: fc445a970ae0c12d62e0f76b0ba44d98 SHA-1: 494f800cf974c97f56f0db50a6ed413fc4226e17 SHA-256: 7cfea2c3d628e326e5369734f4df31656a51137d645bc4dcb1a16abfee42387f

238 Risk Score

Malware Insights

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2007-5659 (Collab.collectEmailInfo). This indicates the file is designed to exploit this vulnerability to execute arbitrary code. ClamAV detections further confirm its malicious nature, identifying it as Win.Trojan.Agent-36171. The embedded JavaScript, named 'javascript_obj0012_000.js', is likely responsible for downloading and executing a second-stage payload.

Heuristics 7

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (matched in decompressed stream)
ClamAV: Win.Trojan.Agent-36171 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36171
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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `2ee6868b57ed9f19282549f7d8bf3ab52ca66b11b8c8b98791a6d8246a98d9cf`	pdf-javascript-stream	PDF /JS object 12 at offset 0xCDF	1688 bytes
Detection ClamAV: Win.Trojan.Agent-36171 Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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