PDF malware analysis — malicious · a4b471ad7e8164d9

MALICIOUS

PDF

14.0 KB Created: 2010-09-10 08:36:27 Authoring application: avo den

MD5: 63fe8cc3a3915327f551ef709776747a SHA-1: 69936646d782d50d38fec821c4c8872fefa0bca6 SHA-256: a4b471ad7e8164d92ae71412a993c7abcc234c2eb664c0a1c0472f27a88ee333

178 Risk Score

Malware Insights

The PDF sample contains critical XFA heap spray exploit code and embedded script payloads. The unescape() call and XFA JavaScript indicate the execution of arbitrary code. This is likely used to download and execute a secondary payload, as suggested by the embedded file artifact.

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_obj0004.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0xBE5	84 bytes
`embedded_file_obj0002.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0xC96	228 bytes
`embedded_file_obj0018.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0xD87	199 bytes
`embedded_file_obj0016.bin` `7d482bf0ff0c7d06d33f045b60922b7bdc5f3c75ae076e9093641e20775574c2`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xE78	119 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xF2F	77 bytes
`embedded_file_obj0003.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0xFD5	56 bytes
`embedded_file_obj0001.bin` `d7de16d7ecf484b0afa243385a8b2566f9f158353fd79c0dfa1c5c0fcb92c772`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x130D	14933 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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