PDF malware analysis — malicious · 949ecc9c28c72dcf

MALICIOUS

PDF

12.0 KB

MD5: d7a05e92a498e683a96315c918f7864d SHA-1: 6f984bfc519faf1ff09c971659162868a6b0fd60 SHA-256: 949ecc9c28c72dcf5ed6db8b75ca6ac3c28f1a3a2515f4d4e476a465c1270803

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2007_5659' firing specifically points to the use of the 'Collab.collectEmailInfo' JavaScript function, which is known to be used in PDF exploits to execute arbitrary code. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') further supports that the sample is designed to run malicious scripts. The exact payload or ultimate goal is not clear from the provided evidence, but the exploit mechanism is evident.

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` `da9bac82b394572b6e340db1afa9e8146a2a75065b45b9ba274ba96b85cbbd51`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12459 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `03619a991d040d39ddbf2ec32a668462ae38743d64c085f2380331168fd09a06`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5132 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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