PDF malware analysis — malicious · ddbf1bdf3d4afed2

MALICIOUS

PDF

343.2 KB

MD5: 8808805c76fd76a5cdb6a17a54ba3c48 SHA-1: 2f2db797d8fc2232cdaa536ac42208a6aeb21537 SHA-256: ddbf1bdf3d4afed20f51b26e935377e43119c0ab411ee4ffdc14590cf44e88f1

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript and U3D/3D content, with heuristics indicating a CVE-related vulnerability exploitation. The JavaScript stream, specifically the `unescape()` call, suggests an attempt to decode and execute malicious code. This points to a likely attack pattern involving exploiting a PDF reader vulnerability to achieve arbitrary code execution, potentially leading to the download of further payloads.

Heuristics 7

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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_017_off0001d0e0.bin` `0c0c8bcab7b22b110679534c96c266c1faeada4906eefa81768876e49a264150`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D0E0	1994998 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`objstm_0016_00.bin` `5ed559d3704a7e5aaa910788859d19bb3e02ccebd0173cd8f1e18ee6b584bc06`	pdf-objstm-decoded	PDF /ObjStm 16 0 obj (inflated)	3648 bytes
`prc_00_off0000c1bc.bin` `03c670f0c42733ada9a3eca79ce9eb5212e4a039c509cd586be81a509cfa2fc3`	pdf-3d-stream	PDF PRC 3D stream at offset 0xC1BC	69337 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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