PDF / .TMP malware analysis — malicious · 20286b8fc4aed818

MALICIOUS

PDF / .TMP

589.4 KB

MD5: 8f5cf89802eddef2d71d6dd5edc62ff1 SHA-1: f7a1c8ab86bea4ced57d7211c5710b6d8311c059 SHA-256: 20286b8fc4aed8188feeb6ac25ffbda68ccfbb1c02130e3dbae4d966ff27b209

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains embedded JavaScript that is obfuscated and utilizes String.fromCharCode, indicating an attempt to hide malicious code. The critical heuristic firing for CVE_2009_4324 (media.newPlayer) confirms the exploitation of this vulnerability. The extracted JavaScript streams, particularly 'legacy_pdfkit_stage_000.js', are likely responsible for downloading and executing a secondary payload. The presence of external URIs pointing to 'www.imagepdf.com' suggests this is part of the delivery chain.

Heuristics 7

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. (identified after JavaScript deobfuscation)
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
External URI info PDF_URI

PDF contains an external URL action
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.imagepdf.com/)/S/URI
- http://www.imagepdf.com/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `8c2ce46f3379f526a0b32f38f1b6a38c1c51660a1203fa052a7db5c5acc82934`	pdf-javascript-stream	PDF /JS object 7 at offset 0x130	41410 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `7a6b9efa5f35da105c641975b531a95b829735f78b2a580affa5fed623663638`	deobfuscated-js	numeric array XOR decoded JavaScript at offset 0x130	9801 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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