Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5f57fe8f53e127…

MALICIOUS

PDF

6.8 KB
MD5: 4532047ce2cf17f576e531e7fbf4ab65 SHA-1: 5728288618a89df3a02d76640e704d7da3f7dba4 SHA-256: db5f57fe8f53e127df098889db16584a258522ecbc6ed0e8846fb383fb76ef4a
118 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The unescape() call within the JavaScript stream suggests obfuscation and potential exploit code. ClamAV detection as Pdf.Exploit.Agent-13608 strongly suggests malicious intent, likely involving the execution of a second-stage payload. No specific family could be identified, but the attack pattern is consistent with PDF exploits.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-13608 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-13608
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • 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. (matched inside decoded stream)
  • 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. (matched inside decoded 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.
  • 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/pdf/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00000327.bin
fbc1209c0bffb6bf1e5468baef7eccb6b3c520e59a54910b5b5133ba055b0aeb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327 1948 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
objstm_0024_00.bin
9a285cf1b5d80c426dd8da5793d55b3f2e09885c189158126c39c3d60854726d		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 331 bytes

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