PDF malware analysis — malicious · cde765a2586e148c

MALICIOUS

PDF

12.0 KB

MD5: f348b643b89577fa2755d6c80d829848 SHA-1: ac7d5ba44be3d9ffb858140afaeeb6bc7c76175d SHA-256: cde765a2586e148cefa585f68c2e8c6f5f202bb0e37fa25d8e131c0b65699769

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The critical heuristic CVE_2007_5659 indicates the exploitation of a known PDF vulnerability using embedded JavaScript. The PDF launcher concatenates fields, extracts characters at a fixed stride, and evaluates the result. This suggests the script is designed to download and execute a second-stage payload. The presence of deobfuscated JavaScript files further supports this. The ClamAV detection confirms the malicious nature of the file.

Heuristics 5

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. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `7cd0e05178d7b2245e707d9d1901221c95c4b77d4847adba50dc9dd829a43fa9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12373 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `13fd01b995e096077d48ff4af2a7da89838b8a03fa104e6b5f5c46f1c9d91c5b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5067 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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