PDF malware analysis — malicious · a3c296b15f5ac924

MALICIOUS

PDF

11.5 KB

MD5: 9d6bd9d098a4dc64a71298864f060de6 SHA-1: c1ddd90d0bd5380ffc9c2c7a40d1975fb8334176 SHA-256: a3c296b15f5ac9244b83d375e3b869f798846cbc90778371868f2e0d1ab5d598

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, flagged by multiple heuristics including a critical detection for CVE-2007-5659. This exploit targets the Collab.collectEmailInfo function to execute JavaScript. The extracted JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, indicate a multi-stage process, typical of exploit kits designed to download and execute further malicious content. The specific exploit used is identified as CVE-2007-5659.

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` `17b65c72d1cc239ac02f1de449e250faf439003d3d39ee0fa7ec480a80845de0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11873 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `70bbbc2bbac67090451185a2524ff14d1aa919d4bb97e185f0d5dde851d09c7c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4876 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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