PDF malware analysis — malicious · 89eb12abc4da9f0a

MALICIOUS

PDF

13.0 KB

MD5: fda82e4ac5e7a197d4bf2abea0a5f3cf SHA-1: 2095d5d1df67b3821cbca62b58ad5a08a3973f79 SHA-256: 89eb12abc4da9f0aad0cd139abc482e662109388c5197bea0832cc045618ff02

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by heuristics as exploiting CVE-2007-5659 via the Collab.collectEmailInfo function. This JavaScript is further processed into two deobfuscated JS files, indicating a multi-stage exploit. The primary function of the script appears to be downloading and executing a second-stage payload, as suggested by the ClamAV detection name 'Pdf.Exploit.Agent-36062'.

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` `432a1ea1d7809e47a32aa443079c429a89c1748d6dc7861300c44813803b01c5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12772 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a3dfd9ffc58b2ca11848162aa3957ef087a55908e7dda88bdc7bb2da1137b5d4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5315 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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