PDF malware analysis — malicious · efdd709f362e83c7

MALICIOUS

PDF

20.2 KB Created: 2010-08-05 14:29:27 Authoring application: chefEve innJerk

MD5: 6764488f739f9198381c056850bb6d9c SHA-1: a405897fb8160705daff561ea34bb1d4f9a27f4a SHA-256: efdd709f362e83c711bf2442c28fced92ffe8bca33e1a94e36c8ff950e58475e

198 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious Link: Malicious File

The PDF sample contains critical heuristic firings for XFA JavaScript heap spray exploits, indicating it's designed to execute arbitrary code. The presence of embedded script payloads and the ClamAV detection of 'Pdf.Dropper.Agent-7321962-0' strongly suggest this is a dropper. The heap spray likely facilitates the execution of the embedded script, which in turn is expected to download and run a secondary payload.

Heuristics 7

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.
XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY

PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
ClamAV: Pdf.Dropper.Agent-7321962-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7321962-0
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 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 0x13F0	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x14A1	228 bytes
`embedded_file_obj0010.bin` `f730d56c5b01062775311fc243aad31236fa029f5b1b9459846997cb402bf1a8`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x1594	27982 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x488E	199 bytes
`embedded_file_obj0012.bin` `b481a8c636eb4cef2663f0bb26aef904a8f457a66c05cd7d5ccd4f68448f3751`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x4980	131 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x4A40	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4AE7	56 bytes

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