PDF malware analysis — malicious · 91167cf4e0653841

MALICIOUS

PDF

21.4 KB Created: 2010-08-26 09:11:20 Authoring application: pesoDaw norIbis

MD5: 36df5e702f6cd5c9d0d5c67f04324278 SHA-1: 445ac3a2559d2dcbb9c738df787c1c8bc614f56c SHA-256: 91167cf4e0653841cff09f671289d17fac412b78a9be16dc373626306c1bdf91

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains XFA forms with heap spray exploit code and risky executable scripts. The embedded file 'embedded_file_obj0010.bin' is a strong indicator of a dropped payload. The XFA JavaScript heap-spray exploit code suggests the document is designed to bypass standard PDF security measures and execute arbitrary code, likely for downloading and running a second-stage 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 0x186E	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x191F	228 bytes
`embedded_file_obj0010.bin` `d99ffb35785f7870bb0f695471f0918a3e7a2c5e217f75bbc28cb8594b41cc76`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x1A12	28675 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 0x4D6F	199 bytes
`embedded_file_obj0012.bin` `6179c1c653958e57700476824edb29a979e8458b7bb38da8f89d18e35e5816ea`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x4E60	131 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x4F1E	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4FC5	56 bytes

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