Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a02af75fc78d3f…

MALICIOUS

PDF

4.0 KB
MD5: fe607fd5e7cfbb039a6dd0587f4e5928 SHA-1: a51f1db27bd336efb7724dad7e5c8c592de71a1b SHA-256: d3a02af75fc78d3f1ab56dd61be96278ab6ef871799c4be60c1b798276003feb
216 Risk Score

Malware Insights

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

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 and the suspicious extracted JavaScript file (javascript_obj0028_000.js) further support the execution of malicious code. This code is likely designed to download and execute a second-stage payload, as suggested by the ClamAV detection of Pdf.Dropper.Agent-7308096-0.

Heuristics 7

  • 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: Pdf.Dropper.Agent-7308096-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7308096-0
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • Suspicious extracted artifact high 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.
  • 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.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0028_000.js
8ad9775515e87c98f8f01c2520e0b67d4a94587faf6ba896b413bdd92063cd6e		 pdf-javascript-stream PDF /JS object 28 at offset 0x50C 3530 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s).

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