PDF malware analysis — malicious · 1d551f01e3c91c3c

MALICIOUS

PDF

12.6 KB

MD5: e2e41adee569b74b5e36dfb6a22bbcd6 SHA-1: 07b18949a0d790325d1f5307a0aa87e5e76adbe8 SHA-256: 1d551f01e3c91c3ccc951790610469ae550ec7d0fcd2676d01231d79d0db5bdb

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic specifically flags the CVE-2007-5659 vulnerability, related to the `Collab.collectEmailInfo` function, which is used to launch JavaScript. The deobfuscated JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', were extracted, indicating the execution of a multi-stage exploit. The primary intent appears to be leveraging this exploit to deliver a secondary payload.

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` `cc46af3b7fa694d80d586d950be4eb83748d514d26da8c267044eb9cfea53dc1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	13041 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `0314297bdbc789f533cdda151095762ef83fe010b0d2ee4a85c6403487621e12`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5340 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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