PDF malware analysis — malicious · e4bee03cdae73b6c

MALICIOUS

PDF

12.5 KB

MD5: 9fa086bd954e48884b5ee7ba455b46e7 SHA-1: 442692b71180304481e8d478f057d6057dea3005 SHA-256: e4bee03cdae73b6c264c5f31895518b9a8b5a573efecf952ed00d5988277bf0b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is executed via the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). The JavaScript is heavily obfuscated but appears to use eval() and String.fromCharCode() to construct and execute further code. This pattern suggests the PDF is acting as a loader for a second-stage payload, likely downloaded from a remote source. No specific family could be identified due to the obfuscation and generic nature of the exploit.

Heuristics 6

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0005_000.js` `c5091284181fbe4be7ebc95afe4ae6ca4b96970563bc08f976fc165ac084f05d`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	306 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `c5168c9c7313732de8e5587f5372869ffa5c26b5efa6e8ef2e982efd67c5b031`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x308	11956 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `edfe25a152f504d65549abc62e7f08c3115e0b12a6cf6c1f22441f2a1b1fb548`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x308	4968 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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