Malicious PDF — malware analysis report

Static analysis result for SHA-256 55bdc1de63613f23…

MALICIOUS

PDF

7.7 KB Created: 2012-04-17 19:53:38
MD5: 900b4fdd29207ea5696e29304bb444cd SHA-1: 57e81b2c50de1a46c1695e0bf6124b34d8356472 SHA-256: 55bdc1de63613f23fc13f295ef703fa64977376bc1c0a007522e88b29fd9a331
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

The critical ClamAV detection 'Pdf.Exploit.Dropped-156969-1' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic indicate that this PDF contains an embedded script designed to exploit vulnerabilities. The 'embedded_file_obj0008.bin' is identified as a suspicious extracted artifact, likely the malicious payload. The document body text is heavily obfuscated and truncated, preventing a clear understanding of its lure, but the presence of an embedded exploit payload is definitive.

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
4d1251a91bb48b8c46c6222beab73eb8945836c857cf978c0c1ea2b036af9b31
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).