PDF malware analysis — malicious · 57f59064b25f6f4f

MALICIOUS

PDF

120.9 KB

MD5: c3079303562d4672d6c3810f91235d9b SHA-1: c19b9b88d9b2d0260c03c75a03cb1f36c0a89c55 SHA-256: 57f59064b25f6f4fc3d564fdf84bd19cf4dacb09987cd9c16cf39768d8d3581e

238 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript and triggers the CVE-2009-4324 vulnerability via the media.newPlayer object. This indicates the PDF is designed to exploit this known vulnerability to execute arbitrary code. The embedded JavaScript, particularly within the secondary PDF found at offset 0x17779, is heavily obfuscated but the presence of unescape() calls and the overall structure strongly suggest it's used to download and execute a further payload. The ClamAV detection of 'Pdf.Dropper.Agent-7262522-0' further confirms its malicious nature as a dropper.

Heuristics 8

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)
Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE

A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
ClamAV: Pdf.Dropper.Agent-7262522-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7262522-0
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.
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.
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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0052_000.js` `45fea71ee6347153ec3719ebc3910509cd6fa568f263c29e7474c694308f5c7d`	pdf-javascript-stream	PDF /JS object 52 at offset 0x3F4E	301 bytes
`javascript_obj0057_001.js` `525a25e1b66ec2bfe53b584887b4f54d069836c2a2d7f67050b50197ca396ab1`	pdf-javascript-stream	PDF /JS object 57 at offset 0x5500	2522 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).
`stream_005_off00000b74.bin` `e4217c167299ac63f64b8b7e903cc0196f0828693d273431b8b793a12ed0fed3`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xB74	1000 bytes
`objstm_0053_00.bin` `f9797d0fa28384c30d8bf1da89163104ce539753e417fa1f9c5fd135d1eceb39`	pdf-objstm-decoded	PDF /ObjStm 53 0 obj (inflated)	50 bytes
`polyglot_child_pdf_off00017779.pdf` `ddca2a6a089d3b8fc4911be41f3f45247ba99ae25297ed4039e7661c9237482e`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x17779	27691 bytes

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