PDF malware analysis — malicious · 90b09dd5375ce433

MALICIOUS

PDF

14.5 KB Created: 2010-08-29 16:19:36 Authoring application: KelUwi KaOva

MD5: cc62e09bbd88708283881e13e67c9461 SHA-1: 4974930083d7b05c84ad33b34f243c14967de56a SHA-256: 90b09dd5375ce43322340be91f55a607ba24977ccf938d81e04319493895a71f

166 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple heuristics as containing risky executable script and an embedded script payload. ML classification and ClamAV detection strongly indicate malicious intent. The presence of embedded files and XFA forms suggests a delivery mechanism for further exploitation, likely leading to the download and execution of a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
ClamAV: Pdf.Exploit.Dropped-81 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
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
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://ns.adobe.com/xdp/

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 0x19E	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x24D	228 bytes
`embedded_file_obj0010.bin` `8015ea4cd5de9f28673b4b540926f115fbc59d535847e07689337645bc6a2aa7`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x340	1632 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x6D3	199 bytes
`embedded_file_obj0012.bin` `c1e412c52e730ffd507a71cdfb18ac1946c4274f597d1dbf0cfef9fddc0f9c94`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x7C5	29219 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x3579	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x3620	56 bytes

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