PDF malware analysis — malicious · e9b77701d09d90f5

MALICIOUS

PDF

11.9 KB

MD5: b7f459f4da55cb8123b20c2931ab9454 SHA-1: 8911f55e5d7eebdfeca7cf638ff69681c223e8e8 SHA-256: e9b77701d09d90f5f02f945f5edd4e26ffb46fa2cc39f203b45888bfb193e55e

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The file is a PDF containing embedded JavaScript, identified by multiple heuristics as malicious. Specifically, the CVE-2007-5659 heuristic indicates the use of the Collab.collectEmailInfo method to execute JavaScript. This JavaScript is likely responsible for downloading and executing a secondary payload, as suggested by the presence of deobfuscated JavaScript files. The overall attack pattern is consistent with PDF-based exploits designed to deliver malware.

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` `f8b848b1b803cf59f341c3fd65295ae30b396d417c66aa6416d2c445b3578bf3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12155 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `92542b5ebbf545a67715940e3612353f56ef7ae91a58bfbfba2124fd5314d9c8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5064 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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