PDF malware analysis — malicious · b707d0800462028f

MALICIOUS

PDF

11.7 KB Created: 2010-11-26 17:42:14 Authoring application: sob dit

MD5: fd10bafdfe709763b853e8577cf340da SHA-1: 437c42fd19f28a157c938751601d88b2b368a99f SHA-256: b707d0800462028f0da3883bd46e6cec6423649868d6ee276947260499ced6b4

268 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains critical XFA JavaScript heap-spray exploit code, indicated by multiple high and critical heuristic firings. The embedded script payload is designed to execute malicious code, likely leading to the download and execution of a second-stage payload. ClamAV detection further supports the malicious nature of this file.

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-7216760-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7216760-0
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_obj0012.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x97F	84 bytes
`embedded_file_obj0017.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0xA31	228 bytes
`embedded_file_obj0002.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0xB21	199 bytes
`embedded_file_obj0016.bin` `50cb0502efa4cd4c657c719076596b920732dcedb5444379811b38e6768624fe`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xC12	119 bytes
`embedded_file_obj0011.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xCCA	77 bytes
`embedded_file_obj0015.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xD71	56 bytes
`embedded_file_obj0008.bin` `d41588a276309ed8e22eb8ee59e5bf4691585dd06ad01df3aaa9d30e7c86500c`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x10AB	11385 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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