PDF malware analysis — malicious · e868a9578e73a1b4

MALICIOUS

PDF

12.8 KB

MD5: 153a940c59a2e08bcfab3fba4898fd85 SHA-1: ac0b0f3352469d114619afc3a80269ecc1fd153e SHA-256: e868a9578e73a1b4a30a1eb398a307005e214c93b2c39eda00c2fa8a8fa5cc90

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). This exploit is designed to execute arbitrary JavaScript, which in turn is used to deobfuscate and execute further stages, indicated by the extracted JS files. The primary function appears to be downloading and executing a second-stage payload, as suggested by the ClamAV detection and the nature of the exploit.

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` `360922f88a4011674aed8eaff1fcb696a3d4cf20ec13d87b8d7585dba2833310`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12457 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `1a0a8bbfa8df4dffe05c825993db44d400e1bf32ed7fde04eb41ea1676798e71`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5212 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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