PDF malware analysis — malicious · 84abc591c5d5d59e

MALICIOUS

PDF

12.2 KB

MD5: 1db7f1a56cb09988d171463a80749ab9 SHA-1: 571a07cae78e69f1acd4dd5fc4b6cfa4a3978de9 SHA-256: 84abc591c5d5d59ead0c5ee159ab5f4887da2b9600dfad5d392f51c5f80ce9ee

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 via the Collab.collectEmailInfo method. The heuristics indicate that this JavaScript is deobfuscated and likely responsible for downloading and executing a second-stage payload. The extracted JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are strong indicators of this malicious activity.

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` `2b01122d7b1fc1112402f1eb47280002003e1a2a9805e3f2ce79b2b0282e82c7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12363 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `18a9559912d5b2e30010e55d6d0d6050a208cedc427bf3acd9a99c314be66142`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5169 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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