PDF malware analysis — malicious · cdccbec88639b498

MALICIOUS

PDF

14.0 KB Created: 2010-09-06 19:03:47 Authoring application: yam ken

MD5: 56ee36c1269be2d57e6179e73b35be64 SHA-1: b05ce9e970a49e5aa290339f98a831e4516dc689 SHA-256: cdccbec88639b4982a816c65f77b274987a1776defd43c7a1000b11f398255a6

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious JavaScript

The PDF sample contains critical XFA heap spray exploit code and risky executable script within its forms. The unescape() call and embedded script payload heuristics indicate that the XFA JavaScript is designed to execute arbitrary code. This likely involves downloading and executing a secondary payload, as suggested by the embedded file artifact. The specific exploit targets XFA forms, a known vector for initial compromise.

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_obj0012.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x927	84 bytes
`embedded_file_obj0003.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x9D8	228 bytes
`embedded_file_obj0002.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0xAC8	199 bytes
`embedded_file_obj0015.bin` `856e1f27a4bf61b0155a3e93db36d90de1e01886d63ad9e67065d291f7a749f2`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xBB9	119 bytes
`embedded_file_obj0004.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0xC6F	77 bytes
`embedded_file_obj0013.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xD16	56 bytes
`embedded_file_obj0010.bin` `26f4bb7142759ef08dd4e2a344d9af85fc1877b1de996d8fbf62cb8f06164e45`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x104E	16054 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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