PDF malware analysis — malicious · a6c53ef7be5bec25

MALICIOUS

PDF

14.6 KB Created: 2010-09-13 16:53:46 Authoring application: sac ohs

MD5: 4065ab4b1ca1cb7b40c679ec04f2531f SHA-1: 8d3f6b89193df8fbb213a56f8b35da9a8f8de0bb SHA-256: a6c53ef7be5bec257c4ae414a4ff26017959f08d891f322872674302a3394c55

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.007 Command and Scripting Interpreter: JavaScript

The PDF sample contains critical XFA heap spray exploit code and embedded script payloads. The primary attack vector appears to be the exploitation of a heap spray vulnerability within the XFA form processing, allowing for arbitrary code execution. The embedded file 'embedded_file_obj0018.bin' is likely the secondary payload.

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_obj0017.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0xD15	84 bytes
`embedded_file_obj0004.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0xDC6	228 bytes
`embedded_file_obj0012.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xEB7	199 bytes
`embedded_file_obj0008.bin` `ad43a40582e96bdc45250c15447c9d84ddbd985c6e9ffc9bc34831ad532e4b1d`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xFA7	119 bytes
`embedded_file_obj0014.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x105E	77 bytes
`embedded_file_obj0001.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x1104	56 bytes
`embedded_file_obj0018.bin` `4fc7a180034c1d4ceef8cf23d7371f27f11db31d64a719255d8bb04d9a26e9ac`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0x143E	15585 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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