PDF malware analysis — malicious · 5fdfdd6838914412

MALICIOUS

PDF

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

MD5: 77635bb8428a8e9ccd9f2dc524cb103c SHA-1: bfd407411402ec5d7fe8562417555091c0fa4dbd SHA-256: 5fdfdd6838914412891a67fcaa725170ced2217dfa3721df2031a907be352804

118 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded scripts and is flagged by multiple heuristics as malicious, including ClamAV detection for 'Pdf.Exploit.Dropped-81'. The ML classifier indicates a very high probability of maliciousness. The embedded file 'embedded_file_obj0014.bin' is likely the dropped payload, suggesting an exploitation for client execution.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Dropped-81 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
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 script payload in PDF stream low 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.
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/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://ns.adobe.com/xtd/
- http://www.xfa.org/schema/xfa-data/1.0/
- http://ns.adobe.com/xfdf/
- http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xD7	67 bytes
`embedded_file_obj0009.bin` `e2e0f6c5cb2e0b2697da89386bfc3718eedaf1b6a2b1d24dd1176d27117bf77a`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x162	781 bytes
`embedded_file_obj0010.bin` `45c6313a70c534019cc5824825e927269c8e9e5955559ca35419268e1686932d`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x4BA	81 bytes
`embedded_file_obj0011.bin` `cb086579e5a1119ff18f092c7a97bacc30fc46bad8cc7cc2d8c62289ecf43b68`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x556	13828 bytes
`embedded_file_obj0012.bin` `103d1e7983cf88bfacedddb4af33ffb5317d9c2c8b3e1bfd987b2c5d712bc985`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x3BA5	323 bytes
`embedded_file_obj0014.bin` `9342db065cdcaf52cc1c03a167a9ee6da4adf7b601ac8728eb048874abd6ddf7`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x3D32	161 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0015.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x3E19	77 bytes
`embedded_file_obj0016.bin` `78b09463af5cd373870eae2e3e83de87b7f6b659e0d0117ab4c09d90ebb2ad95`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x3EAD	68 bytes

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