PDF malware analysis — malicious · b6f91dbb02b1c4b0

MALICIOUS

PDF

21.3 KB Created: 2010-08-30 10:06:54 Authoring application: dakPier ergMoot

MD5: 578c5e76d9a181ed8db80c2dc3a12b10 SHA-1: be767c59e645927871c0380075fdaebb2dc62b70 SHA-256: b6f91dbb02b1c4b0cb8499ce6e78b63d49ff17d3b7d29461412414f97b00f0c6

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains XFA (XML Forms Architecture) which is known to be vulnerable to heap spray attacks. The heuristic PDF_XFA_HEAP_SPRAY indicates that exploit code was found within an XFA JavaScript stream. This script is likely designed to download and execute a second-stage payload, as suggested by the PDF_EMBEDDED_SCRIPT_PAYLOAD and PDF_XFA_SCRIPT firings. The embedded file 'embedded_file_obj0010.bin' is a strong indicator of a dropped payload.

Heuristics 6

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.
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_obj0008.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x182C	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x18DD	228 bytes
`embedded_file_obj0010.bin` `dfdfb5d77d86ab923202b8f331c61f982f07b992ebb165223e9991d51aee124f`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x19D0	28502 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x4CC0	199 bytes
`embedded_file_obj0012.bin` `2ad00f8256907f6beaa45310b21f0f91af700c9ee7311d30fb7bd8348760a94c`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x4DB1	131 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x4E6E	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4F15	56 bytes

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