PDF malware analysis — malicious · 3f018a7ac2d68f0e

MALICIOUS

PDF

42.7 KB

MD5: e509f7aefe87d54c3a10e73d4ace8228 SHA-1: 392b7bdd4e3d80eb19d0278175442f59a21b321f SHA-256: 3f018a7ac2d68f0e2d8252fd7cb7e40311b5bf1640e5df1979275d47306ea5fc

96 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF contains embedded JavaScript and U3D content, with heuristics indicating a high likelihood of malicious activity related to CVEs affecting Adobe Reader's 3D parsing. The ML classifier strongly supports this assessment. The embedded JavaScript, particularly the deobfuscated version, likely facilitates the execution of further malicious code, potentially downloading and running a second-stage payload. The presence of multiple extracted JavaScript files suggests a complex, multi-stage attack.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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_obj0005_000.js` `e98d2ee473b9a16751401b2efe1ab53561db61f4b1f06b39437a60319734e8ab`	pdf-javascript-stream	PDF /JS object 5 at offset 0x14F	479 bytes
`legacy_pdfkit_stage_000.js` `6fd8295478ad418cd21adfbacd87c0cedbef70f09c08a145e3ab27b9125abbe3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1A5D	12457 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `977662bdf34458bbd297b388556eaabf719d7a630ebf0c6d7187bc52509dca7b`	deobfuscated-js	PDF JavaScript deobfuscation pass	284292 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`u3d_00_off00003e62.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x3E62	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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