PDF malware analysis — malicious · ab2b4bf44a4ba92a

MALICIOUS

PDF

12.8 KB

MD5: e12c74e57efcad9b366115de3f2b7d20 SHA-1: 8c1818ddee9ed443ee3ed9497ac2eaa6c29bc069 SHA-256: ab2b4bf44a4ba92ac9b2e4a4315141b7f6d9032f1e5533508639369860232432

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious JavaScript

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo function. This JavaScript is further obfuscated and split into multiple streams, indicating an attempt to conceal its malicious actions. The primary goal appears to be the execution of a secondary payload, as suggested by the deobfuscated JavaScript files found.

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` `c772d88bc7b29c1de707bd042fa9ed8e87ae6bc43f886b378567338457c26003`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12492 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d7312e2ce29acb8467d1c121daee869d66536d09399e925faa64cac733a3dd45`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5190 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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