PDF malware analysis — malicious · 278321d6bf740c9a

MALICIOUS

PDF

12.6 KB

MD5: c6eef5ac52ed9747ee6f1ccabc22ff3c SHA-1: 54315debcd8eee08165787a685e776772746c463 SHA-256: 278321d6bf740c9acd2b20cce0a4eeea92bd4099d309cb28cab6694fb64cfcb8

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution: JavaScript Execution T1204.002 Malicious File: User Execution: Malicious File

The critical heuristic CVE_2007_5659 indicates the exploitation of a known PDF vulnerability using embedded JavaScript. The file also contains embedded JavaScript streams and deobfuscated JavaScript files, suggesting a multi-stage attack. The ClamAV detection further confirms its malicious nature. The embedded JavaScript likely downloads and executes a second-stage 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-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` `42e0692ac037952fcd68c502fe95120518e4dc320b962b6c35a1851f80211f51`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12307 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c23a475031684f1f6f681e8dbfa779e007df95fc4f6176724c93de7f32596847`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5142 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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