PDF malware analysis — malicious · c3b3e3420877d341

MALICIOUS

PDF

11.8 KB

MD5: 1a333487c69f44dd7caff65189651159 SHA-1: 173122dfd15963e686f69764b478de3898bfcc3d SHA-256: c3b3e3420877d341bbea9f899c9b63fd0ed98b2ea451df986eb3e4b35188b2a5

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, specifically points to the use of Collab.collectEmailInfo for JavaScript execution, indicating an exploit attempt. The presence of deobfuscated JavaScript files further supports the malicious nature of the document, suggesting it's designed to deliver a second-stage payload.

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` `55d0d493e9a8e29fdc924628d723e86bca59883bd66e5b023b704de0aee8c9d2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12066 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `51de97f60cbb1157b75003892eda642b63d122c2cb4226a20f4d5a6f2b32c620`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4954 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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