PDF malware analysis — malicious · a4bd29f33cfa379d

MALICIOUS

PDF

44.6 KB

MD5: 4a8967d6c8d2b684e4eec567c88d3967 SHA-1: f3b35668c06fde14625609a519baec59ad3a075e SHA-256: a4bd29f33cfa379d6cfa4b33dbeca1baf69c6f333a28d991df75af85e0a60300

106 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.001 PowerShell

The PDF contains embedded JavaScript and U3D content, with high-confidence heuristics indicating exploitation of Adobe Reader's 3D parser (CVE-family). The embedded JavaScript, particularly the deobfuscated version, likely contains malicious code designed to be executed upon successful exploitation. The presence of multiple JavaScript files suggests a multi-stage attack, potentially involving downloading and executing further payloads.

Heuristics 6

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.
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.
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` `3185725d1d6720a44a86ea6b71cc2cc403b0506593fae676bafde71d6ece01a0`	pdf-javascript-stream	PDF /JS object 9 at offset 0x43D2	472 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `cb51b5236b1ff229de104cbcc7d695ebf8e14720b4fc22564f14bf3aa335fc5e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1B51	12466 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` `be1415934cc4c6a3bb427b0fb804df483032801afffa8a9cf14aff792162fc66`	deobfuscated-js	PDF JavaScript deobfuscation pass	240832 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off00004608.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x4608	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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