PDF malware analysis — malicious · 470e8e2b9f80fa8a

MALICIOUS

PDF

14.9 KB Created: 2010-09-17 06:16:43 Authoring application: eau sly

MD5: e13d1db627603da122a287ac58892dc0 SHA-1: 6fdc1743fa7ee413e62dc5ee062ab4c17fbc7a5c SHA-256: 470e8e2b9f80fa8a7dc9cf0dc6c0a3247437cb198071afccc66422bf329406a4

208 Risk Score

Malware Insights

The PDF sample contains XFA (XML Forms Architecture) which is known to be a vector for exploits. High severity heuristics indicate PDF_XFA_HEAP_SPRAY and PDF_XFA_SCRIPT, confirming the presence of exploit code within the XFA form. This code likely attempts to spray the heap and execute arbitrary code, a common attack pattern for PDF exploits. An embedded file, 'embedded_file_obj0011.bin', was also extracted, which may contain the secondary payload.

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_obj0007.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0xDA3	84 bytes
`embedded_file_obj0018.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0xE55	228 bytes
`embedded_file_obj0010.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0xF46	199 bytes
`embedded_file_obj0006.bin` `3c662a6b8b3d79091aecee77fbfacdcf15d972f75057ce1ab620bee1965746ce`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x1036	119 bytes
`embedded_file_obj0001.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x10EC	77 bytes
`embedded_file_obj0017.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x1193	56 bytes
`embedded_file_obj0011.bin` `eca09789c9acabc2195472e88084a364d98ce5b84aad47ccc9d5f18abd5d483c`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x14CD	15703 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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