PDF malware analysis — malicious · b1c4aeacc19151d6

MALICIOUS

PDF

12.3 KB

MD5: f6cdd824dd9ee771ce10ae8ff9878209 SHA-1: fbf8216a613db850d8f380aff5a8cc22e1db87bd SHA-256: b1c4aeacc19151d696c56a9a124e110935da9468c2a4ca6919de86fa71ad5146

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits CVE-2007-5659, specifically using the Collab.collectEmailInfo function. This JavaScript is further obfuscated and split into multiple streams, indicating an attempt to evade detection. The primary goal appears to be the execution of a secondary payload, as suggested by the deobfuscated JavaScript files.

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` `7cf9a351e47e5df0593475036dd9ff57bb5df78e5bb84036f4f933bcb203b40f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11991 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `e888fa5b3032984e547c1c69b35aa5ce401521f5a0f000d44039ff07954a776f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4932 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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