PDF malware analysis — malicious · 9c46c15a02cad535

MALICIOUS

PDF

12.0 KB

MD5: eb36b888a3aea4e075fa95fe407178fa SHA-1: 1c4644a916f1078b215c8979267743f85b661e5b SHA-256: 9c46c15a02cad53588c0bab99d5eb957ff93c61e99a04566ebe2d52cf72ef8c1

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the CVE_2007_5659 heuristic which specifically targets the Collab.collectEmailInfo function for exploitation. The extracted JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are indicative of a multi-stage exploit. The primary function of this script appears to be downloading and executing a second-stage payload, as suggested by the heuristic firings and the nature of the extracted JavaScript artifacts. The ClamAV detection further confirms its malicious nature.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `a9ad14e5ee2db523886152973271daa83b4334620fda7f91d4eb0e2c12d21e49`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11736 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `7650af9ccf61b59b8ba94ef51f68a5e6189ce02ca50cd72606090df891a0638e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4755 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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