PDF malware analysis — malicious · fc7d912aaab749ad

MALICIOUS

PDF

12.1 KB Created: 2011-01-30 14:19:34 Authoring application: lay you

MD5: 9be67747c40a9697e99c467920a9e992 SHA-1: da0be641a503c0ce24208aa509da40fd32d9b7de SHA-256: fc7d912aaab749ad3fb334447843cc59f39684412dcfa6ab1e78c46dd482230e

208 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF sample contains critical XFA JavaScript heap-spray exploit code, indicated by multiple high-severity heuristic firings. This exploit code is designed to download and execute a second-stage payload, likely contained within the embedded file object 'embedded_file_obj0008.bin'. The ML classifier strongly supports the malicious nature of this PDF.

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_obj0014.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0xB1B	84 bytes
`embedded_file_obj0004.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0xBCC	228 bytes
`embedded_file_obj0017.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0xCBD	199 bytes
`embedded_file_obj0018.bin` `3970459bcdf2d6784f2a0fbc0fc4f15a349d1c3a1db5cd2f5eebd3829b389d11`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0xDAE	119 bytes
`embedded_file_obj0012.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xE66	77 bytes
`embedded_file_obj0001.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0xF0C	56 bytes
`embedded_file_obj0008.bin` `9872307005845b060c5eb34caf52bd276c053f1d4451b5e2c6a57c8208255503`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x1241	11375 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).

Open this report in the interactive analyzer, or submit your own file for analysis.