PDF malware analysis — malicious · cf865bdbf07e5921

MALICIOUS

PDF

12.1 KB

MD5: 10e06812ab275414e7a659a5b4284d94 SHA-1: 006664c6ffa55c2d6f7853f38889a1199985896a SHA-256: cf865bdbf07e5921727c49819d38404e53cfa113936506f572da8dc1d7fbb2af

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution T1204.002 Malicious File Execution: Malicious JavaScript

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 named 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' further supports the execution of malicious scripts. The likely intent is to download and execute a second-stage payload, as suggested by the exploit nature and the presence of multiple script stages.

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` `cb0c25b8239f9ae0329fcfb322a93e69807d724ffd96ff2411e88e29130fd8bf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12344 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `2c20f8401fca113da9f111decb69679e8a14849d5d7e58b07c2886a06df8e8a3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5086 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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