Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f683c2247b42311…

MALICIOUS

PDF

7.0 KB First seen: 2026-05-11
MD5: cda7baafa0975dc1103117aea148e41e SHA-1: c19546ce873ff3e786f130b2bd5a5a833ecc9bc3 SHA-256: 7f683c2247b423112e4e2826d82ef482631950169993a1d4806b7c8108fa6b59
210 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains embedded JavaScript that triggers a known exploit (CVE-2009-4324) related to media player handling. The JavaScript is obfuscated and uses unescape() calls, indicating an attempt to hide malicious code. This exploit is likely used to download and execute a secondary payload, though the specific URL is not directly present in the extracted evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

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)
  • JavaScript action low 2 related findings 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)
  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
    Matched line in script
    return unescape(etxvizy);
  • 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# In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
🗂 Part of campaign: shared payload 8b50be2df1 3 samples

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00000327.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327 1231 bytes
SHA-256: 8b50be2df1eb8d362314afb2b0be0b867953986946aff5a5688379a175744075
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
objstm_0024_00.bin pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 648 bytes
SHA-256: e42c11b8766a56b1c753449708545f25e0944d57ba09ee3ef70126b08e900ba9

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