PDF malware analysis — malicious · a53b1656087d1dcc

MALICIOUS

PDF

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

MD5: 6926dbfb9e640a3576cb99cc4413078e SHA-1: 18f99558f3fa111216c69b9ec44803d8ea4bcdc9 SHA-256: a53b1656087d1dcce0cd65a2939b034c6e8ecb4f2c0423a2328adaf1069b82d9

178 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains XFA forms with executable scripts and an 'eval' call, indicating an attempt to exploit vulnerabilities. The presence of multiple embedded files, including one flagged as a suspicious script payload, suggests the document is designed to download and execute a secondary payload. The ClamAV detection 'Pdf.Exploit.Dropped-81' further supports this assessment.

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
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/
- 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` `51a31f8558983c35fe5e038fb41aebaca8b406725509607307dd3926e5e2d540`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x162	781 bytes
`embedded_file_obj0010.bin` `51b730a8b2cc5c41349d1b66a6d03ef68961f492e73118c6f13b0262610bf98f`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x4BA	89 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `f40c8f70ddeff2038aa295a4c6e33bbdd774301ee9ae1880fd72839a15dfd49e`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x55E	13914 bytes
`embedded_file_obj0012.bin` `103d1e7983cf88bfacedddb4af33ffb5317d9c2c8b3e1bfd987b2c5d712bc985`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x3C03	323 bytes
`embedded_file_obj0014.bin` `9342db065cdcaf52cc1c03a167a9ee6da4adf7b601ac8728eb048874abd6ddf7`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x3D90	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 0x3E77	77 bytes
`embedded_file_obj0016.bin` `78b09463af5cd373870eae2e3e83de87b7f6b659e0d0117ab4c09d90ebb2ad95`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x3F0B	68 bytes

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