Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ccbceb450226d85…

MALICIOUS

PDF

7.8 KB Created: 2012-04-06 19:15:32
MD5: b3c4c512e1bb875ae6faf70f2cbcfe46 SHA-1: 8bacfdbb8bc1228591372c2820fda4053a2b7c61 SHA-256: 8ccbceb450226d854708370df97fba160f64fb9a3ebba7dc1ecff28eb7a780e2
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Dropped-156969-1, and an ML classifier also flagged it with high confidence. A PDF embedded script payload was detected, indicating the document is designed to exploit a vulnerability and likely drop a secondary malicious file, as suggested by the 'Embedded file' and 'Suspicious extracted artifact' heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-156969-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-156969-1
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0010.bin
dbb7512abad5453e1209ab81b9e1a568fb28202cbccf9181fd83f36e28af4d52
pdf-embedded-file PDF EmbeddedFile object 10 at offset 0xC8A 6998 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).