PDF malware analysis — malicious · 376ee447477ba7b9

MALICIOUS

PDF

21.1 KB Created: 2010-08-25 13:48:40 Authoring application: oreAids bailCol

MD5: a61023977dc5f18497ce9c12279d5e4a SHA-1: 119dbaf5552e1e9dae07b54221133adac2372baa SHA-256: 376ee447477ba7b9c35776e11b626de2cc19ecf42ea1ef0e55031b1e15c95e4e

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains XFA form elements with embedded JavaScript, triggering a heap spray exploit. This script is designed to download and execute a second-stage payload, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic and the ML classifier's high confidence. The embedded file 'embedded_file_obj0010.bin' is likely the payload.

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 0x160F	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x16C0	228 bytes
`embedded_file_obj0010.bin` `cca9375309267b71d59e7e1a73899965bac2a21c20ebaae32811248e10419af8`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x17B3	28715 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 0x4BE2	199 bytes
`embedded_file_obj0012.bin` `c537bc78eee3f2156fef790bdc0ef02f3755b16e86810f8cb12e542701069f1e`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x4CD4	131 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x4D95	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4E3C	56 bytes

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