PDF malware analysis — malicious · d78ff70ee75713c1

MALICIOUS

PDF

17.8 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap

MD5: 23f91b4130680b50058d1c9f70a16119 SHA-1: 45882f787d7cf5be0ea9ba39b9c8b3df0c93a78c SHA-256: d78ff70ee75713c15ed9531863ba2daa2af4672c816b7c0f021afa3107e8d51d

168 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The PDF contains a risky executable script within an XFA form, as indicated by multiple high-severity heuristic firings. ClamAV detection as Pdf.Exploit.Dropped-81 and the ML classifier's high confidence score further support its malicious nature. The embedded script is likely responsible for dropping a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

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

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 0x20D	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x2BE	228 bytes
`embedded_file_obj0010.bin` `66c1347b708465c34ea75e360bc572e3e0b716d2247b3d81a34ae223f0101b04`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x3AD	1331 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x6DC	199 bytes
`embedded_file_obj0012.bin` `3953c93acc5d9840ca62d37d44d984353632d066f730acea8c03deebfb8e4f96`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x7CE	34280 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x426A	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4311	56 bytes

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