PDF malware analysis — malicious · 2328aa46d5f8918e

MALICIOUS

PDF

18.4 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap

MD5: 520bcc2f46e188d62685c745272afcdd SHA-1: 0d41f262f7678c08a9d2df7af663a10a24a68570 SHA-256: 2328aa46d5f8918e57b3dd2d851daaee140beab52593dc3b50d6bb0a212a504a

136 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File Execution T1204.002 Malicious File Execution: Malicious PDF

The critical heuristic 'CLAMAV_DETECTION: Pdf.Exploit.Dropped-81' and the high heuristic 'PDF_XFA_SCRIPT' indicate that this PDF file contains malicious XFA script. This script is likely responsible for exploiting a vulnerability to download and execute a secondary payload, as suggested by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' firing. The embedded file artifacts further support the payload delivery mechanism.

Heuristics 5

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

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x2C9	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x37A	228 bytes
`embedded_file_obj0010.bin` `f28c4d6f16c0ae5d39bd63adcb0e5172474dd822dd8d93f5f86d7d3fb58454ee`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x46D	1460 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x7C2	199 bytes
`embedded_file_obj0012.bin` `631277b430ef0a58c76e029b0408b94241d7310c0565dd3120d238a215e78c66`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x8B4	34177 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x431B	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x43C2	56 bytes

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