Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd1882352d02bf2…

MALICIOUS

PDF

44.9 KB
MD5: 184e9007ddb41fde58bc5090b99dc014 SHA-1: 7e783c18bac17fa6c5ef87f81c2354b65f18e01d SHA-256: 9fd1882352d02bf2112d6322d655201cd2a0de78964af116d79af6a9b89d8456
66 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and U3D content, triggering heuristics related to JavaScript execution and potential exploits like CVE-related indicators. The presence of multiple deobfuscated JavaScript files suggests an attempt to download and execute further malicious payloads. The exact intent of the script is unclear due to obfuscation, but the overall pattern points to a malicious PDF designed to exploit vulnerabilities.

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.

FilenameKindSourceSize
javascript_obj0009_000.js
c1b5ff130aac3af62fca14faf6f47a429f61afc2e81b304b56820c851fef2fa9
pdf-javascript-stream PDF /JS object 9 at offset 0x4522 450 bytes
legacy_pdfkit_stage_000.js
1057159dc7ea033420354c3213860adf8a516f879cce10e7c06d34cc5698ea5b
deobfuscated-js repeated-marker hex decoded JavaScript at offset 0x1C6D 12592 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
b36c4b70adbaaf96ea9f5df2cb682ec06634fe1b7699d6a638c7e86e800cd444
deobfuscated-js PDF JavaScript deobfuscation pass 304613 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 long base64-like blob(s).
u3d_00_off0000475e.bin
fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628
pdf-3d-stream PDF U3D 3D stream at offset 0x475E 28021 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.79, consistent with packed or encrypted content.