PDF malware analysis — malicious · 95652c111f314657

MALICIOUS

PDF

12.7 KB Created: 2010-12-27 23:18:35 Authoring application: jeu fil

MD5: 1fa8e7cb06e8d80156a2d75df9fdda37 SHA-1: 4d1f8bfee3feaf75bb5f114c9189ee0a9468b6c4 SHA-256: 95652c111f314657bf39adec2631906d98e385b25a2fa0a81ee4d3ac8e21f3c5

208 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF sample contains XFA form elements with embedded JavaScript, triggering a heap spray exploit. This exploit is designed to execute arbitrary code, likely to download and run a second-stage payload. The ML classifier strongly indicates malicious intent, and the presence of an embedded file further supports this. The specific exploit technique points to a targeted attack leveraging PDF vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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_obj0015.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xDC2	84 bytes
`embedded_file_obj0003.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0xE73	228 bytes
`embedded_file_obj0013.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xF64	199 bytes
`embedded_file_obj0006.bin` `8290d4426084473060e0e7486be74fc0bd682ccd520c7344c9f6067ccc4a83cb`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x1054	119 bytes
`embedded_file_obj0002.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x110A	77 bytes
`embedded_file_obj0011.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x11B1	56 bytes
`embedded_file_obj0005.bin` `68641b455a1dbca64692e16d5405ec32a39dcc2ae287e211e8136455f8cee501`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x14E9	11246 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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