PDF malware analysis — malicious · 749ead842ad5bbc0

MALICIOUS

PDF

11.8 KB

MD5: 9e91d506ab599c5c909a35182e6d107f SHA-1: 35bacee42aebaa289b7d9edd0159a4df83b96957 SHA-256: 749ead842ad5bbc01cadeb134cca6c6ebece6444a3bb0b42ecef4e6375d32f12

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 heuristic 'CVE_2007_5659' specifically points to the exploitation of a known vulnerability (Collab.collectEmailInfo) to execute JavaScript. Deobfuscated JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', were extracted, suggesting a multi-stage malicious process. The exact payload or final intent of the scripts could not be fully determined due to potential obfuscation, but the exploitation of a PDF vulnerability to run code is a common initial access technique.

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` `24afae80565bd9e9f60d17feb2363fb883db930a2b28a7938b0435e2e769e7d5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12134 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f89a22dc552a8e205cad14f00f9c43d2c31ad7333aeeece7144fddb4df2664a9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4950 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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