PDF malware analysis — malicious · 93ba0239885719e8

MALICIOUS

PDF

12.2 KB

MD5: 34386a1b9c6526e7f8a2ad0d9cd02fb5 SHA-1: 5d29f2626a9731a5085feeeb9ed570eaa6553a27 SHA-256: 93ba0239885719e8f361d48bfcddf7549cb43d5bd8f88fa711674d36c88c96c3

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 User Execution: Malicious Link

The PDF file contains embedded JavaScript that exploits the CVE-2007-5659 vulnerability using the Collab.collectEmailInfo method. The heuristics indicate that this JavaScript is likely used to download and execute a second-stage payload, as suggested by the extracted JS files and ClamAV detection. The attack pattern involves luring the user into opening a malicious PDF which then exploits the 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-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` `a0de43c3d756b6dc8aa804c0d350b23632d84bb86bce9ecba9cd6d44ab5c0fc2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11854 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `515b76ab50eb05a012f9ec2e390fa7f952e1e77c20ebf54c4854f8d2a3686f1b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4852 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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