PDF malware analysis — malicious · 5669b9398637d177

MALICIOUS

PDF

11.8 KB

MD5: e06512dc2ea87d2d5e7d3a8cd161700b SHA-1: 616b479d7443f32a12c517d75bef9387deed00b1 SHA-256: 5669b9398637d177084daa6394e180c7d1304c2c7169a7e0510660bf04d3f88b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

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

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` `919ad5b01e538635dbe816f2f60f8ca0ce5b6914adae1dd04288edba2b1cc35c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12031 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `76a29ed32acdf8d6b03a9f597c5c159bc7f8d542766b910b336b331c591ae15a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4972 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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