PDF / .TMP malware analysis — malicious · 852fee6d3480d2cd

MALICIOUS

PDF / .TMP

883.7 KB

MD5: 7564cd601e23af2ed721f36bd1d1b4bb SHA-1: 55bec15fc15388c0f0281e11b045b13257652a9d SHA-256: 852fee6d3480d2cd70e1a5fd17589e1503d36e6db645f4fc112effc9558eedc0

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript that is obfuscated using String.fromCharCode and numeric array XOR decoding, indicative of exploit attempts. The critical CVE-2009_4324 heuristic firing confirms the exploitation of a known PDF vulnerability. The embedded JavaScript is designed to download and execute a second-stage payload from the URL http://www.imagepdf.com/. This indicates a downloader or dropper attack pattern.

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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