Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e8d88125446d84…

MALICIOUS

PDF

4.3 KB Created: 2011-04-05 23:46:28 Authoring application: bub lob
MD5: 3a55367c13bc820218cc0248be98ca35 SHA-1: 52ab4f86a0b933d9bd611ae93104e13dc526b0a5 SHA-256: a9e8d88125446d84104dcc351f42ab829d9316a12fbe6fbc3ee4abb8a845213f
76 Risk Score

Malware Insights

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

The PDF file contains embedded script content, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD and PDF_XFA_SCRIPT heuristics. This script is likely designed to download and execute a secondary payload, as suggested by the presence of an embedded file object. The XFA form further increases the risk by allowing executable scripts. The exact nature of the script's execution is not fully discernible due to potential obfuscation, but its presence strongly suggests a malicious intent to compromise the user's system.

Heuristics 4

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
7708127e1aff4f5dd32d40df77dbf989e8f3651688165c6acf28286586fa41fb
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x167 13049 bytes