PDF malware analysis — malicious · a531c64dbc894709

MALICIOUS

PDF

7.3 KB

MD5: 9eeecb1a3680850443126cd22c4994d2 SHA-1: dfbf92bc36c51f16b9418c1ea88051f43c86c318 SHA-256: a531c64dbc89470985a766dfdec8f88d3372aee281b11f16dfc070ee08126dd4

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious Link/URL T1059.004 Python T1059.003 Windows Command Shell T1059.007 JavaScript/JScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic firing suggests exploitation of a vulnerability related to Collab.collectEmailInfo. The unescape() call further points to obfuscated JavaScript. The embedded JavaScript file, javascript_obj0006_000.js, is likely responsible for executing the exploit and downloading a secondary payload. The ClamAV detection confirms the malicious nature of the file.

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. (matched in decompressed stream)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `88f6c75299a71c44d6e29a83777897be380785577d98ce7b3caafa5aef47e9c7`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19F	6095 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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