PDF malware analysis — malicious · ad1c15d165160073

MALICIOUS

PDF

21.1 KB Created: 2010-08-09 06:23:58 Authoring application: prodMol firUdos

MD5: b073ea09e24382b0c1e5d6b24284c5db SHA-1: f6f0c60eef2137aae72f77af5965e63df83c37ad SHA-256: ad1c15d16516007309a041cb51d148e1dbecb17cc3d340b7942ae074f5caeda4

168 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF sample contains critical XFA JavaScript heap spray exploit code, indicating an attempt to execute arbitrary code. An embedded script payload was also detected, and ML classification strongly suggests maliciousness. The presence of an embedded file, specifically 'embedded_file_obj0010.bin', is highly suspicious and likely contains the secondary payload. The exploit targets XFA forms, a known vector for delivering malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

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.
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 0x1848	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x18F9	228 bytes
`embedded_file_obj0010.bin` `3a011a3db80f2850a6d0dfb080ec9f3de120ccc9e99547ed8970d3b278a8aa7f`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x19EC	27704 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 0x4C06	199 bytes
`embedded_file_obj0012.bin` `1210feefa3e5cf8f93dffd7803bceb5900fd4eea56d366cf362abc0826d2011e`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x4CF8	131 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x4DB8	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4E5F	56 bytes

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