PDF malware analysis — malicious · 3d2e2eab6a35f6ec

MALICIOUS

PDF

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

MD5: 6c494651a6017ef2667d47783782d73d SHA-1: 67b4efc611609924fb057655349e40a7526919af SHA-256: 3d2e2eab6a35f6ece7cbb73d3954a40e16b244e758f56e025e69a8410ace1eb4

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059 Command and Scripting Interpreter T1059.007 Command and Scripting Interpreter: JavaScript

The PDF contains XFA forms with risky executable scripts, indicated by multiple high and critical heuristic firings. It also embeds several files, including suspicious artifacts flagged for script obfuscation. The ClamAV detection 'Pdf.Exploit.Dropped-81' further confirms its malicious nature. The primary attack vector appears to be the exploitation of XFA form vulnerabilities to execute embedded scripts, likely leading to the download and execution of a second-stage payload.

Heuristics 7

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
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 0xDB	67 bytes
`embedded_file_obj0009.bin` `6b2260d3c78649345d3f0b850b831d545d33bb7017ccdf438cdfe1e9db7f2db2`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x167	294 bytes
`embedded_file_obj0010.bin` `6523e7ae411af77928f420056db8105f8669556415679a4194dcb9e8c2538902`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x2D8	533 bytes
`embedded_file_obj0011.bin` `48d67c58eef0d778661fd831768b9bd80f17490673cadde071b8628c0b0dac78`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x538	22939 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0012.bin` `103d1e7983cf88bfacedddb4af33ffb5317d9c2c8b3e1bfd987b2c5d712bc985`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x5F1E	323 bytes
`embedded_file_obj0014.bin` `3275499da31d53b3a1c3d0d6c34dac803f5035cc26f0d36814d0b437d0e21cc5`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x60AB	166 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 0x6197	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x622B	56 bytes

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