Malicious PDF — malware analysis report

Static analysis result for SHA-256 e702e97bbb2e1716…

MALICIOUS

PDF

6.4 KB
MD5: 0779f76a867d77c69fe6c807c82b67d8 SHA-1: 46ae61dbcd05c0a5d1ad05fcce1cc5a9e8918a34 SHA-256: e702e97bbb2e1716db89b1a35f3f97c5b7c88f36ad2ea9457f5409fb8d3103fe
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that is obfuscated using unescape(). The primary heuristic firing indicates exploitation of CVE-2007-5659 (Collab.collectEmailInfo), a known vulnerability in Adobe Reader. This vulnerability allows for the execution of arbitrary JavaScript, likely to download and execute a second-stage payload. No specific malware family could be identified.

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)
  • 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. (matched inside decoded stream)
  • 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. (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.
  • 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/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00000635.bin
6c9c86c1e1f4160ceca463adce1610125b3da36e5181b2a24d84760e99884b16		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x635 536 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s).
objstm_0023_00.bin
6c9ab3471d067a3451a6e059203d4f4c744d32a9770734f2fcf3e55889146c0b		 pdf-objstm-decoded PDF /ObjStm 23 0 obj (inflated) 274 bytes

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