PDF malware analysis — malicious · c05236ab69bcb6b7

MALICIOUS

PDF

11.7 KB

MD5: bbba05fb85293356abc56ebbd2e4dd90 SHA-1: a0593d95a835be900a4d146a14df8b1af2f8cf60 SHA-256: c05236ab69bcb6b735b9db539cf979f5444295d40e82388af52142552fd6ed83

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, specifically triggering the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo method. This JavaScript is further deobfuscated into two files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, indicating a multi-stage exploit. The ClamAV detection of Pdf.Exploit.Agent-36065 confirms its malicious nature. The primary attack pattern involves exploiting a known PDF vulnerability to execute arbitrary code, likely to download and run additional 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` `ade33498a14584a3143e10ab18472842bec7359a1deb1eb81d675438887f9316`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12092 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `cbebe6490bc65651eda5bcb3bdca2d94b2e9df9d8aa22a8fdeaae963ce0aa0ea`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4986 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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