Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cad5b1f19883a90…

MALICIOUS

PDF

58.9 KB
MD5: 282778eb24b58496d19b0086898ecfe3 SHA-1: ce5fcde56aa03bf5ffb45d442268a93d71827797 SHA-256: 4cad5b1f19883a900da191c702d8c8088f2c3dda9eabf738c609ad7a2ad03a82
166 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, including calls to eval() and unescape(), which are commonly used to obfuscate malicious code. A RichMedia (Flash) object and an embedded file are also present, indicating an attempt to deliver and execute a secondary payload. The heuristics suggest exploitation of PDF vulnerabilities to achieve arbitrary code execution.

Heuristics 9

  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector (matched inside decoded stream)
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/AcrobatAdhocWorkflow/1.0/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0003.bin
f0156a5c9cfac0444d237fb92b5b9731faaa34f807b3d583c1b88283feefed46		 pdf-embedded-file PDF EmbeddedFile object 3 at offset 0xA3B 26804 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.
objstm_0019_00.bin
3b5f37322e402293ca6e2f0d9e5733173102abb55233352bb4f51de3efb1d207		 pdf-objstm-decoded PDF /ObjStm 19 0 obj (inflated) 1275 bytes

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