PDF malware analysis — malicious · 365b7082e8a4e341

MALICIOUS

PDF

12.8 KB Created: 2010-09-22 03:43:24 Authoring application: tho uke

MD5: 27512990538e7c038639988e5e66d2a6 SHA-1: efc18ede04dbb181e2a7ff62296af77e324bb07c SHA-256: 365b7082e8a4e341dd83baf4b652d13186b3649336cc581857559f7ae9872520

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The PDF sample contains critical XFA heap spray exploit code, indicating an attempt to execute arbitrary code. The presence of embedded scripts and an embedded file further supports this. The exploit likely targets a vulnerability within the XFA form processing to achieve code execution, potentially leading to the download and execution of a second-stage payload from the embedded file.

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_obj0016.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xDF4	84 bytes
`embedded_file_obj0012.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xEA6	228 bytes
`embedded_file_obj0005.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0xF96	199 bytes
`embedded_file_obj0011.bin` `e4e375c0e34ab9bcdd3a5c523bf146e4d767ae1248388a422aa79b169beeeaba`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x1087	119 bytes
`embedded_file_obj0010.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x113F	77 bytes
`embedded_file_obj0002.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x11E5	56 bytes
`embedded_file_obj0019.bin` `7a06cb1da6d2ae5a0a0f102e8d8bba9e8eb445ebaab1935fb24f84ec05d2c937`	pdf-embedded-file	PDF EmbeddedFile object 19 at offset 0x151E	11410 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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