PDF malware analysis — malicious · e65c3bf91184d5c4

MALICIOUS

PDF

15.0 KB Created: 2010-08-29 16:19:36 Authoring application: QousEqysixinibafu Noqaqsaohuehumyna

MD5: 9e0701d187f91444e7347ca5e98c17ba SHA-1: 4ed85a18b64ceb34c6935d82c30b9bb5076f1028 SHA-256: e65c3bf91184d5c4ff994066f8ddb435cf5e1f1f5917fd7de793fe30243f2078

208 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell T1105 Ingress Tool Transfer

The PDF sample contains high-severity heuristics indicating an embedded script payload and an XFA form with risky executable script. ClamAV also detected it as Pdf.Exploit.Dropped-81, suggesting it's designed to drop a malicious file. The embedded file object 'embedded_file_obj0010.bin' is likely the dropped payload. The ML classifier strongly flagged this PDF as malicious. The embedded URLs are related to XFA forms but do not appear to be directly malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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

ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
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/
- http://www.xfa.org/schema/xci/1.0/

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 0x237	228 bytes
`embedded_file_obj0010.bin` `39b22b62fbc1072635c6e61e55e575bc933b4018ab50c5a2a59269ad7980f9b3`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x377	1906 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x75D	199 bytes
`embedded_file_obj0012.bin` `d4386cc8cd8f33e9c00d2cd4c605a83ab1096a64dbc4fed8549c34e4f50044d2`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x84F	29967 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x36F8	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x379F	56 bytes

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