Malicious PDF — malware analysis report

Static analysis result for SHA-256 94496a36e90b4044…

MALICIOUS

PDF

8.0 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)
MD5: 1c11efa1984ffdadc9016cc2c067fe14 SHA-1: 65c607e757e88e231b0f0e6ba9f8bd9747e321a8 SHA-256: 94496a36e90b4044392a6f780515ff71a5a1a85622ca3e93d95053822a69fb41
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript with multiple eval() calls, indicating obfuscation and malicious intent. The ClamAV detection 'Pdf.Exploit.Agent-35587' confirms its malicious nature. The embedded JavaScript likely attempts to download and execute a second-stage payload from one of the provided URLs. The obfuscated nature of the script and the use of eval() make it difficult to determine the exact payload without further dynamic analysis.

Heuristics 7

  • ClamAV: Pdf.Exploit.Agent-35587 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35587
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://phpnet.us/byet300x250.php
    • http://ad.foxnetworks.com/st?ad_type=pop&ad_size=0x0&section=204717&banned_pop_types=28&pop_times=5&pop_frequency=86400

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0013_001.js
226a333d6a399be3b5a41349b8f3b4f396ab941a63803010957c6c7c0c5e3fcd		 pdf-javascript-stream PDF /JS object 13 at offset 0x3DC 5855 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35587
Obfuscation or payload: likely
Carved artifact contains 5 eval/decoder/string-building token(s).

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