PDF malware analysis — malicious · 45d708bce6070ee1

MALICIOUS

PDF

21.0 KB Created: 2010-08-16 10:43:44 Authoring application: queyPsi perElmy

MD5: ecfdb20e6d4bc4e19163bbd39d7fff40 SHA-1: 551d320ba547470796a6e45ff89e4a2a6f9a7549 SHA-256: 45d708bce6070ee16b8fadcd9521c0839f415e683628708a08cb4b51a4131c88

170 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The PDF sample contains XFA form elements with embedded JavaScript, triggering a heap spray exploit. This exploit is designed to download and execute a secondary payload, indicated by the presence of an embedded script payload and a suspicious extracted file. The ML classifier strongly flags this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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 0x14F1	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x15A2	228 bytes
`embedded_file_obj0010.bin` `5d4adcf65de574ee2f42a7c71bae117af2d8b8d10d278b9eb01c04f38ac56194`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x1695	30027 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 0x4BC3	199 bytes
`embedded_file_obj0012.bin` `257be748f4a86fb7e78a45984fef64628caae320a1e6fcc88b75833819072cda`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x4CB4	131 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x4D72	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4E19	56 bytes

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