PDF malware analysis — malicious · 3f9e859aceeedb52

MALICIOUS

PDF

14.4 KB Created: 2010-09-18 06:50:10 Authoring application: jag her

MD5: 2cdc57b170f34fcad6e0f69b3c7871d6 SHA-1: 60f7f9805e1f153ac210e9d1c5034770cbdf9eae SHA-256: 3f9e859aceeedb52317c364c583dbe3a6cac786f78e08c566e3f13debfffac2a

178 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF sample contains critical XFA heap spray exploit code, indicated by the PDF_XFA_HEAP_SPRAY heuristic. This exploit likely leverages embedded JavaScript within the XFA form to achieve code execution. The presence of an embedded file, specifically 'embedded_file_obj0013.bin', suggests it serves as a payload or part of the exploit chain. The primary attack vector is user interaction with the malicious PDF, leading to the execution of the embedded exploit.

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_obj0019.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 19 at offset 0xA4E	84 bytes
`embedded_file_obj0018.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0xB00	228 bytes
`embedded_file_obj0004.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0xBF0	199 bytes
`embedded_file_obj0006.bin` `4e68fd4d4fff0775469cbc368f588f965304053ae95c89bc5a1d35547c695980`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0xCE0	119 bytes
`embedded_file_obj0001.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0xD96	77 bytes
`embedded_file_obj0012.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xE3D	56 bytes
`embedded_file_obj0013.bin` `bd1ce3232c13f19d4ca41987172e859a45b3c39b9ec99cf39952f4269d710738`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x1179	16652 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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