Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3b966bc830dc39…

MALICIOUS

PDF

14.7 KB Created: 2010-08-29 16:19:36 Authoring application: LadrDofydu JetihtocebfImu
MD5: 04218abf0df3fff51bda084e390eed9a SHA-1: b3f2aae47eac18d2cfd76ed42aa87a4afb4719d9 SHA-256: ac3b966bc830dc395f7ad94383083e63ee7fe740be65522fc854bda1f2e98be3
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File T1059 Command and Scripting Interpreter T1059.007 JavaScript/VBScript

The PDF file contains embedded executable scripts, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'PDF_XFA_SCRIPT' heuristics. The 'CLAMAV_DETECTION' heuristic further confirms its malicious nature, identifying it as 'Pdf.Exploit.Dropped-81'. The embedded URL, while benign, is present in the document structure. The primary attack vector appears to be exploiting a PDF vulnerability to deliver and execute a malicious 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 0x19E 84 bytes
embedded_file_obj0009.bin
24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0
pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x24D 228 bytes
embedded_file_obj0010.bin
82391896cca51ba510902a9efa024726076393b46eecf8eca47bad89f793ba9c
pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x340 1752 bytes
embedded_file_obj0011.bin
c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460
pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x6F4 199 bytes
embedded_file_obj0012.bin
cc70a91e31c12f18fffe22c98d867f5b313c0a73512a2b991ed1d98a97d93b7a
pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x7E6 29305 bytes
embedded_file_obj0013.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876
pdf-embedded-file PDF EmbeddedFile object 13 at offset 0x35D0 77 bytes
embedded_file_obj0014.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a
pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x3677 56 bytes