PDF malware analysis — malicious · 9d36c0139f53ee9e

MALICIOUS

PDF

12.2 KB

MD5: d3147be28e2d5836e85059e667cf244a SHA-1: 151d9456c657f3675c98f3f0b9cb6b0f453add43 SHA-256: 9d36c0139f53ee9e31af3d901140f98d69e5b0cae32f86c8bf48ad73fe2cc5d0

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, specifically leveraging the 'Collab.collectEmailInfo' function which is associated with CVE-2007-5659. This exploit is designed to execute arbitrary JavaScript. The analysis also identified two deobfuscated JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', suggesting a multi-stage attack. The primary intent appears to be the execution of malicious code via a PDF vulnerability.

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` `f5d9789908bf25c2da782b1f844c849c57e3640540e160fa89037594ca001bee`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12429 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `80a9d426905cc4bcd530aa7e625b9b927374db2a7bec0795645385292fc04411`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5167 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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