PDF malware analysis — malicious · be313e530ddcc029

MALICIOUS

PDF

44.9 KB

MD5: 2d3374d27306107013fa539d5b64fedb SHA-1: b070a0cd172848a0c6265d8f699bcd8f6b488abc SHA-256: be313e530ddcc029bd24daa6c26599867be2dfc9198f5bed302357d1c24f2aec

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and 3D content, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_U3D_CVE_RELATED, and PDF_FOXIT_SYNCANNOTSCAN. The presence of deobfuscated JavaScript files suggests that the script is designed to execute malicious code, likely to download and run a second-stage payload. The specific techniques used point towards a delivery mechanism involving user interaction with the PDF, potentially exploiting vulnerabilities in PDF viewers or tricking the user into executing embedded scripts.

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` `9eec12b326e4b023d726ef1aacd937cccb1c52c58f137c96b64f6ef7b15bdb43`	pdf-javascript-stream	PDF /JS object 9 at offset 0x4529	449 bytes
`legacy_pdfkit_stage_000.js` `df45b757570deaf79366b718b1d6b79300140004d5af9bc3a18f752ebf001c73`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1C85	12582 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` `3917a1e4d5eb439f261eed69b3c819283ab3a0c5d3d4c399872b34b9b34bcceb`	deobfuscated-js	PDF JavaScript deobfuscation pass	229408 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off00004769.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x4769	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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