Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2da6e9dd9ef2d4…

MALICIOUS

PDF

17.5 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap
MD5: 78ef56ce0abf1bafd11a9d3ab2649dbe SHA-1: 33dd418fa3164d1ba0ef3f88c65b1b9035332d50 SHA-256: bc2da6e9dd9ef2d44ae1eac78986f9757cc1903bfb560bcbd2df6c6230f00c00
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The PDF file contains embedded script payloads and XFA forms with risky executable scripts, as indicated by multiple heuristic firings. ClamAV also detected this as Pdf.Exploit.Dropped-81. The embedded script is likely designed to exploit a vulnerability within the PDF viewer to download and execute a secondary payload.

Heuristics 6

  • 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.
  • ClamAV: Pdf.Exploit.Dropped-81 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
  • 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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x13E 84 bytes
embedded_file_obj0009.bin
24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x1ED 228 bytes
embedded_file_obj0010.bin
0d78f933b5d6f50446674c74bc701ce18b70fe9d1c0db48ae7e532b514058bcb		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x2E0 1339 bytes
embedded_file_obj0011.bin
c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x60F 199 bytes
embedded_file_obj0012.bin
1070c9e42920c294f88fee51dce9bdd4c97dff2aa21074f2d14e3d8f816de93b		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x701 33911 bytes
embedded_file_obj0013.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876		 pdf-embedded-file PDF EmbeddedFile object 13 at offset 0x413A 77 bytes
embedded_file_obj0014.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x41E1 56 bytes

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