PDF malware analysis — malicious · cdf82b355a0b7a30

MALICIOUS

PDF

43.2 KB

MD5: 471557aacd61d9959358a780c4a6a047 SHA-1: b775386585af1b112fb39179a981784f70d8fd14 SHA-256: cdf82b355a0b7a30edb88da490a6a27f94b42d529726f2df66441695c84bfa8c

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript and a U3D stream, which is flagged as a CVE-related indicator. The presence of JavaScript actions and embedded JS streams suggests an attempt to execute code. The heuristics indicate that this PDF is likely exploiting a vulnerability, possibly related to Adobe Reader's 3D content handling, to run malicious JavaScript. The extracted JavaScript files, particularly 'deobfuscated.js', are large and complex, suggesting they are responsible for the malicious payload delivery. The exact intent of the script is unclear due to obfuscation, but it is likely to download and execute a second-stage payload.

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` `e4030e0803751505576435940f3632f702229569b9e8edfb4232a09faa241620`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1B77	12981 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` `baf947aa3b43a0253f17664df33f0dc127ab3b0c7fefcae74598b96be10d6774`	deobfuscated-js	PDF JavaScript deobfuscation pass	218706 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`u3d_00_off000040a3.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x40A3	28021 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.79, consistent with packed or encrypted content.

Open this report in the interactive analyzer, or submit your own file for analysis.