Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e04a9fe63af35e…

MALICIOUS

PDF

6.1 KB
MD5: 52824d4278af5d931e6195a9eb4f0d33 SHA-1: 755788a6ee377ae416d5ed6f3f2e7911d463f0bd SHA-256: d5e04a9fe63af35e6ee22c8916068bed68655852e75ac4321fd0bae39150bf5c
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.001 User Execution: Malicious Link T1204.002 User Execution: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical finding is the CVE-2007-5659 exploit related to Collab.collectEmailInfo, suggesting the file attempts to leverage this vulnerability. The presence of an extracted JavaScript file (javascript_obj0006_000.js) further supports the execution of malicious code. The overall behavior points to a malicious PDF designed to exploit a vulnerability and likely download additional malware.

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.

FilenameKindSourceSize
javascript_obj0006_000.js
662e0bb8f82b4a6e7830c7c02efb66ea8ddb1475a63f9d14fc5837dfbef925aa
pdf-javascript-stream PDF /JS object 6 at offset 0x18F 5366 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).