PDF malware analysis — malicious · be1217b2183befc1

MALICIOUS

PDF

14.1 KB Created: 2010-09-19 07:12:37 Authoring application: nip awe

MD5: 7df22cc6f2b57a16b3a82581027bf8a5 SHA-1: 68e99310256a56505bc9ed2c576ebe9cc6a5d263 SHA-256: be1217b2183befc11534aac64dfbc2dc897b4d83939e6e03317b78f36de98fce

178 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a PDF file that utilizes XFA forms and contains a heap spray exploit targeting XFA JavaScript. This exploit is designed to download and execute a second-stage payload, indicated by the embedded script payload and the critical PDF_XFA_HEAP_SPRAY heuristic. The embedded file 'embedded_file_obj0005.bin' is likely the 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_obj0015.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x99A	84 bytes
`embedded_file_obj0013.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xA4C	228 bytes
`embedded_file_obj0004.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0xB3C	199 bytes
`embedded_file_obj0007.bin` `015080f500579314d147019a29d7cd49ae0b8da2d478756b4775d898801fccb6`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0xC2C	119 bytes
`embedded_file_obj0011.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xCE4	77 bytes
`embedded_file_obj0009.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0xD8A	56 bytes
`embedded_file_obj0005.bin` `ab8d7b8f79d28b180605cb4c8bbc89c0a8225e96382e022a4f87ea75315fd69b`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x10C4	16145 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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