Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a1a6bd621afb1e9…

MALICIOUS

PDF

6.3 KB
MD5: 023d8c6ee781eb24e180569e5f4ea9ec SHA-1: f2978fcc975f164a027718a1107613de889ff3cb SHA-256: 2a1a6bd621afb1e93b2255c9667eb20c295d38547ee84a92dac87ad4e134a9d5
118 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2009-4324, indicating it exploits a vulnerability in PDF readers. The JavaScript is obfuscated, but the presence of the exploit suggests the intent is to download and execute a second-stage payload. The benign URLs present do not detract from the malicious nature indicated by the exploit.

Heuristics 6

  • media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324
    PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (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_002_off00000324.bin
eb3bb040bc1d09d43825581e96b7684732662acea35528fa43ac3ab792608a48		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324 394 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
objstm_0024_00.bin
187cf245ce77a103c2a86b3eb2c782d2e09d079865cc53c797774b20ae79577d		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 331 bytes

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