Pdf.Dropper.Agent-7250545-0 PDF malware analysis — malicious · 39c6a6ca44f90f04

MALICIOUS

PDF

47.4 KB Created: 2010-12-12 12:59:04 Authoring application: kaf ask

MD5: b76a365810a18fcdaace72c7e9f113ae SHA-1: 38eaf3b7b4604517bdbd214a008bccd7037976e2 SHA-256: 39c6a6ca44f90f04e1b1f77f71eb6157da61dd4ba1360a483311d2d4422bd8cd

208 Risk Score

Malware Insights

Pdf.Dropper.Agent-7250545-0 · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file exhibits multiple high-severity heuristic firings, including PDF_UNESCAPE and PDF_XFA_SCRIPT, indicating the presence of malicious JavaScript within an XFA form. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded file, particularly 'embedded_file_obj0011.bin', likely contains the secondary payload. The overall behavior points to a dropper mechanism designed to exploit PDF vulnerabilities and download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 7

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.
ClamAV: Pdf.Dropper.Agent-7250545-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7250545-0
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_obj0003.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x35A8	84 bytes
`embedded_file_obj0016.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x36AD	228 bytes
`embedded_file_obj0014.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x38CE	199 bytes
`embedded_file_obj0002.bin` `8d59679a5877e8f0c2ed2bbf542163802eb55459825dcf91e2c3ad0436a0c260`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x3AAE	119 bytes
`embedded_file_obj0001.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x3BF4	77 bytes
`embedded_file_obj0004.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x3CE8	56 bytes
`embedded_file_obj0011.bin` `41dda013a3b357f65f28405947cb43e2e43857ece5d1817beea94b97e9519712`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x405B	16091 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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