Malicious PDF — malware analysis report

Static analysis result for SHA-256 58bab2e6a3b1f3be…

MALICIOUS

PDF

7.8 KB Created: 2012-04-27 17:25:24
MD5: 0f4b2d270c66fc21e9ad2554e7fad39b SHA-1: 8640c9b73813e3f7c7258aa32759c5cb09d8c195 SHA-256: 58bab2e6a3b1f3bebfe2e7fac02107067927f7192f09f2c4d8edfdb5563dc898
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: Malicious PDF

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating an embedded script payload and an embedded file. The presence of 'Pdf.Exploit.Dropped-156969-1' suggests the PDF exploits a known vulnerability to drop a secondary payload. The embedded file 'embedded_file_obj0010.bin' is likely this payload.

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
81f8272501d3370d6091ebca22387d2e009bbe0eb92ed75c30e322ddb7a0925d
pdf-embedded-file PDF EmbeddedFile object 10 at offset 0xCB8 7229 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).