PDF malware analysis — malicious · 465f5cb1a367233b

MALICIOUS

PDF

212.2 KB Created: 2010-06-29 10:30:35 +08:00 Authoring application: Acrobat PDFMaker 8.0 for Word (via Acrobat Distiller 8.0.0 (Windows))

MD5: a7aac390c248d98a29d678da66b4a728 SHA-1: 3f952a3e3b3a35b67b639dc3a127f87df0825143 SHA-256: 465f5cb1a367233bcaad172dd114dadbdf52d310902b9d1978b3c626da9cfa39

244 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits CVE-2009-4324 via the media.newPlayer API. This exploit is designed to download and execute a secondary payload. The presence of multiple embedded PDF objects and obfuscated streams further suggests a multi-stage attack. The benign URLs extracted are likely unrelated to the malicious functionality.

Heuristics 9

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)
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.
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact medium 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.
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)
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload (matched inside decoded stream)
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/
- http://ns.adobe.com/pdfx/1.3/

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off00000392.bin` `1e5f72ee982da8bd3cf583f9b71534013af67fd96b8b4322d1d754ef5f2844a1`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x392	4070 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). Carved artifact contains 1 long hex-escaped blob(s).
`legacy_pdfkit_stage_000.js` `42c3f4df375ff6f58ff655cc4f88b5cc28f0dd33b978390db3538684a6219b74`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x392	126 bytes
`objstm_0017_00.bin` `dd7918c182d6e2b8d996a6b8ee81663c49a0cb297efe1e1fa3c5af0c987bde84`	pdf-objstm-decoded	PDF /ObjStm 17 0 obj (inflated)	871 bytes
`icc_00_off00028e4e.icc` `2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e`	pdf-icc-profile	PDF ICC profile at offset 0x28E4E	3144 bytes
`font_00_sfnt_off0002a74a.bin` `848a07b68b5b28b144919564bb1346bcbf8b75978565676c3b5a6900d922f71b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2A74A	167032 bytes
`polyglot_child_pdf_off0001f09b.pdf` `2258992ea51ea4bbcc5f01901dccc11d13ea85e8b71a591a6dd09d52f6186339`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x1F09B	90135 bytes
`polyglot_child_pdf_off000338c5.pdf` `0b1c923c8a0028794f3a3244dc498786746334f394e41678cc58ffbeb707d0a8`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x338C5	6125 bytes

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