PDF malware analysis — malicious · 8ff6bbd72ca58683

MALICIOUS

PDF

11.7 KB

MD5: c2a466ee1edfbbbd1d3ca09278a17253 SHA-1: a3200df51ed98f28ff414aec2a0ce5806e27fbf9 SHA-256: 8ff6bbd72ca5868352b44eb1ef7f32eecb6f3ba811f408828b58eddbdb3279ae

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2007-5659. The critical heuristic firing for CVE_2007_5659 indicates that the JavaScript uses the Collab.collectEmailInfo method to achieve code execution. The embedded JavaScript streams are heavily obfuscated, but the exploit itself is well-documented. The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36079.

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` `117d1a86fc0c65e4f0f1336c24ac942741ffba7c107edc64f3889e03c3b3bb2c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12130 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `0723ff55e2398b338583be0e48b9a6b3c77c33d7fa0dbcdc3ed52f96b09d3837`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	4983 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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