PDF malware analysis — malicious · aae085210bf0f8eb

MALICIOUS

PDF

11.7 KB

MD5: 739aa35e1b2c79462ff6050c26aef1fd SHA-1: 21c0167367e74847ef9392bb1a65a6b9aedb4bc2 SHA-256: aae085210bf0f8eb1c986c586d4778d51c383a80c42595415da0eb9b59445e6c

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/Object

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability. This vulnerability allows for the execution of arbitrary code, indicated by the 'Collab.collectEmailInfo' method firing. The extracted JavaScript streams and the ClamAV detection further confirm the malicious nature of the file, suggesting it's designed to exploit this specific PDF vulnerability.

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)
ClamAV: Pdf.Exploit.Agent-36079 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36079
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_obj0007_000.js` `ef8bdac794684ae9cd4eb7091d80e1c5ca478c06c639d72d01626c1f7ce78b6d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	578 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `82c657f0a959f6d411c41d1eaf00791912b01245d018e13c2e43b419c5426633`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12126 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `35a689619fcd94012acf0f284cbd71a17fbca3e299935fe42ff4fa895077629d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	4970 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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