PDF malware analysis — malicious · 100760426c1193d3

MALICIOUS

PDF

79.8 KB

MD5: b66d3a7584b689ffb97e33a25126c0d7 SHA-1: a05e028e9b23de2b3822918f2b9ce345a721304b SHA-256: 100760426c1193d3b0bfc2e5863f7c374f7fe41ba54b0d383cee8cc380a70ed9

200 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains heuristics indicating JavaScript execution and exploitation of PDF vulnerabilities, specifically mentioning a cluster related to PDF JavaScript exploits and U3D/3D content. The embedded JavaScript stream and the 3D content references suggest an attempt to leverage these features for malicious code execution. No specific family could be identified from the available evidence.

Machine Learning

Nyx PDF Classifier suspicious score 0.2902

Heuristics 8

U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
PRC/3D content in PDF high CVE related PDF_PRC_3D

PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
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. (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)
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://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_015_off0000670a.bin` `f46d42a6283f9c5f1b564c96a91ec700df507cfd066b8d5d31cd75ee0ba5f8b2`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x670A	2684 bytes
`stream_017_off0000da88.bin` `e557ffee9402235e7858e68e8bade014cb0db196bf7d4f7495ac834c5d4cbe5f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xDA88	117354 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`objstm_0016_00.bin` `d30134d8738e19adb682c48f1058bc7f6ed729b3e789868abc63ec97faf4681a`	pdf-objstm-decoded	PDF /ObjStm 16 0 obj (inflated)	3373 bytes
`prc_00_off000092b8.bin` `98bcd3bebc9d7e31019b97748510062e7a72861f09f9173a85d6a561bc77b908`	pdf-3d-stream	PDF PRC 3D stream at offset 0x92B8	18310 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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