PDF malware analysis — malicious · 3dd3ff1dfc72ed8e

MALICIOUS

PDF

13.0 KB Created: 2010-11-18 13:41:01 Authoring application: pen sod

MD5: 5e3638e62dab1aa31fc7fa86a5ad40af SHA-1: 273bab709284d7815924ebb847ef7734ad0534c0 SHA-256: 3dd3ff1dfc72ed8e73ca812ec537643cac450de18391f82510c05ef031c1273a

268 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.001 PowerShell

This PDF sample exhibits critical heuristic firings related to XFA JavaScript heap-spraying and embedded script payloads, strongly indicating exploit code. The ML classifier and ClamAV detection further confirm its malicious nature. The presence of XFA form exploitation suggests an attempt to download and execute a secondary payload, typical of a dropper. No specific family could be identified.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 8

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.
ClamAV: Pdf.Dropper.Agent-1828693 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828693
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 0xEBE	84 bytes
`embedded_file_obj0006.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0xF6F	228 bytes
`embedded_file_obj0018.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0x1060	199 bytes
`embedded_file_obj0009.bin` `c1023efebd7bb85f3a20eca1bd7db384e1233481168e4d2000c998a92a33c001`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x1150	119 bytes
`embedded_file_obj0004.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x1206	77 bytes
`embedded_file_obj0005.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x12AC	56 bytes
`embedded_file_obj0014.bin` `9b0fd4cd8931b5cdd8a7013e8ab76c80ae5326c8daa61439b21cce8342814040`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x15E0	11308 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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