PDF malware analysis — malicious · 4fff300450cbf436

MALICIOUS

PDF

29.4 KB Created: 2010-08-29 16:19:36 Authoring application: RaxOigeqan Ryhadurrcifu

MD5: 33fa17ff37c3255ed05ed2a6fc61187f SHA-1: 7840e8f4eeea0f8927b572526fec5fe155cdf541 SHA-256: 4fff300450cbf4365fffb3e16805dc13ca8921ae518ea1ab81d47f3f92627123

208 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains high-severity heuristics indicating an embedded script payload and XFA form exploitation. ClamAV detection as 'Pdf.Exploit.Dropped-81' strongly suggests it's a dropper for further malicious content. The ML classifier also flagged it with high confidence. No document body text was available for analysis, but the presence of embedded files and script exploitation points to a delivery mechanism for a secondary payload.

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
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 0x1AB	67 bytes
`embedded_file_obj0009.bin` `6b2260d3c78649345d3f0b850b831d545d33bb7017ccdf438cdfe1e9db7f2db2`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x238	294 bytes
`embedded_file_obj0010.bin` `2a29f5ab08c8dfa02a39ee9e664018dfc5a418ef62b4964140caa6aca697db09`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x3A9	584 bytes
`embedded_file_obj0011.bin` `ea9664ebfbeadfaf3dcc9629efa09e16dcfbe71f6afb8e262f4f3e735e22dff0`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x63C	26578 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 0x6E59	323 bytes
`embedded_file_obj0014.bin` `8588e122b4d728c62a4ccd1a3b3593489c02a299a793ae4ab213fe9add2817f9`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x6FE6	178 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 0x70DE	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x7172	56 bytes

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