Malicious PDF — malware analysis report

Static analysis result for SHA-256 22bbc63480589281…

MALICIOUS

PDF

7.6 KB Created: 2012-04-17 19:53:38
MD5: 5b5707233670c4a87853ae5e1fcc6afa SHA-1: 2a2ec1439d28be33006750fe8aef99b4b8e3dbc8 SHA-256: 22bbc634805892816b4186350a92a89134d0286af26e5eecb4a2101b06d6a659
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File Execution T1204.002 Malicious File Execution: Malicious File T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The critical ClamAV heuristic 'Pdf.Exploit.Dropped-156969-1' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic indicate that this PDF contains and likely executes a malicious script. The embedded file 'embedded_file_obj0008.bin' is also suspicious. The document body contains garbled text, suggesting it is not intended for human consumption but rather to exploit a vulnerability.

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_obj0008.bin
786cdd0e09d002d3383ced97aec2b48d32282edf81b28b67009882d715cbcbda
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xBAF 7163 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 long base64-like blob(s).