PDF malware analysis — malicious · b870d75e06e61c67

MALICIOUS

PDF

14.0 KB Created: 2010-09-16 09:17:56 Authoring application: leu pul

MD5: b30f69e91c45927bc90355298af564d7 SHA-1: f4648d95e76a1495fffd8cd64a7e99f136ed1605 SHA-256: b870d75e06e61c67bd10075eaa874af3fa3d70860fbecdc368720e6ca23228af

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains critical XFA JavaScript heap-spray exploit code, indicated by the PDF_XFA_HEAP_SPRAY and PDF_XFA_SCRIPT heuristics. This suggests the file is designed to exploit a vulnerability in Adobe Reader's XFA form processing. The embedded file 'embedded_file_obj0004.bin' is likely the payload. The unescape() call and embedded script payload further support the malicious intent.

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.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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_obj0007.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0xB75	84 bytes
`embedded_file_obj0002.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0xC26	228 bytes
`embedded_file_obj0008.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xD16	199 bytes
`embedded_file_obj0017.bin` `a54c3ca7fdbe77e73dc0460d70a365dda5f66a306cee759f4524e60e8b8e9fbe`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0xE07	119 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xEBE	77 bytes
`embedded_file_obj0019.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 19 at offset 0xF65	56 bytes
`embedded_file_obj0004.bin` `ff67579fcc40dc77ea0b653ce663ce59042d5e034123a8ed08d619b338b0a0d8`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x12A0	15197 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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