PDF malware analysis — malicious · 9676ed1d3423e383

MALICIOUS

PDF

45.4 KB

MD5: 9b59fb1d9b30ccb50f3182c7604b75e5 SHA-1: aeec51c2e03403fe8b5ad2f5ad8c2d19f1228ccb SHA-256: 9676ed1d3423e3830ce3e02d2582030782620978b7f2387a8927463768f3b01a

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File Execution T1059.001 PowerShell

The PDF file contains embedded JavaScript and U3D content, with heuristics indicating a potential exploit related to Adobe Reader's 3D parsing capabilities. The presence of multiple JavaScript files, including one labeled 'deobfuscated.js', suggests an attempt to download and execute a second-stage payload. The extracted artifacts and heuristic firings strongly indicate a malicious intent, likely involving exploitation of a PDF viewer vulnerability.

Heuristics 5

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.
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.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed 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.

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `e4103a3d42885bfbcadb232cdc979bf56a631c8dc3410d30e3b92f5c3bc99c62`	pdf-javascript-stream	PDF /JS object 9 at offset 0x46FF	524 bytes
`legacy_pdfkit_stage_000.js` `82c55069cfb0a6e9cff85b4d16d9ec908c24a39aabf844e1882954066fdc76a6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1CBE	12786 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `574d5ee781504e949ad03f0920e0ef987a9e44d5141213d8014cf7ecd9740f09`	deobfuscated-js	PDF JavaScript deobfuscation pass	236532 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off0000494c.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x494C	28021 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.79, consistent with packed or encrypted content.

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