Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9658c3c352f491…

MALICIOUS

PDF

7.3 KB
MD5: 9f73fdf96e4ec90d90fe33254e9f6618 SHA-1: 333afebce7050e157d1b8babd581b8983c491b4a SHA-256: 3d9658c3c352f49111bb0fe37302ff54beb2a46c17c654726a6d77fbcd9b0f66
88 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged as malicious by an ML classifier and contains an embedded Flash file (Tatsumaki.swf). The presence of an embedded SWF file, combined with the high ML score, strongly suggests it's intended to deliver a malicious payload. The document body itself does not contain user-readable content, but the embedded artifact is a clear indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
Tatsumaki.swf
21f95225ec883afc805995dc080ca264272f3015de9b526a28650feebc0265f7
pdf-embedded-file PDF EmbeddedFile object 18 at offset 0x3C0 4725 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.95, consistent with packed or encrypted content.