PDF malware analysis — malicious · dfda8e1f7c315d30

MALICIOUS

PDF

67.4 KB Created: 2010-06-29 10:14:47 +08:00 Authoring application: Acrobat 编辑器 8.0 (via Adobe Acrobat 8.0)

MD5: b489cc6cc71db00764626da8a0d5d5c5 SHA-1: c4bfd2ba72a883ee7260c355a3b03cd039a98560 SHA-256: dfda8e1f7c315d30ad4a0a86f284acd95e10ca52932fa92e098a3f71073e9517

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains embedded JavaScript that is obfuscated and utilizes the unescape() function, indicating malicious intent. The critical heuristic firing for CVE_2009_4324 confirms the exploitation of a known Adobe Reader vulnerability. The presence of a secondary embedded PDF further suggests a multi-stage attack. The primary function of the JavaScript appears to be the execution of exploit code, likely leading to the download of additional malicious content.

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)
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.
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.
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.
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_obj0021_000.js` `dd957791cf3ea91d9aa5ef655b3a1d6c4a92036e875c2437657f276955dab674`	pdf-javascript-stream	PDF /JS object 21 at offset 0x514	2371 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s). Carved artifact contains 1 long hex-escaped blob(s).
`stream_009_off0000cc74.bin` `9d7e19ac218e6f8728365073f89e3d1f12b424f876a74ba4ef022cb2a54a74ce`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xCC74	341 bytes
`legacy_pdfkit_stage_000.js` `42c3f4df375ff6f58ff655cc4f88b5cc28f0dd33b978390db3538684a6219b74`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x514	126 bytes
`polyglot_child_pdf_off0000b506.pdf` `b2dbf1b70f29b41da569667ecb933901cca9d7cf6129dc94ac8dfe455737ff8f`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0xB506	22634 bytes
`polyglot_child_pdf_off0000f583.pdf` `0b1c923c8a0028794f3a3244dc498786746334f394e41678cc58ffbeb707d0a8`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0xF583	6125 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.