PDF malware analysis — malicious · d0a1e2be2a955379

MALICIOUS

PDF

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

MD5: 6fd7edb67354df8065f393725b506c35 SHA-1: 67d442178156aee6cddcad8dd1d2055ce29b6d8e SHA-256: d0a1e2be2a95537921487253d937b8fa72a57e9e8b5dde4fefeb6777a68c97db

276 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059 Command and Scripting Interpreter T1059.001 PowerShell T1059.007 JavaScript

This PDF document exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms. The heuristic firings indicate the presence of embedded scripts and an eval() call, suggesting the document attempts to download and execute a second-stage payload. The ClamAV detection of 'Pdf.Exploit.Dropped-81' further confirms its malicious nature. The embedded files 'embedded_file_obj0011.bin' and 'embedded_file_obj0014.bin' are likely components of this payload.

Heuristics 10

Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188

PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
XFA form contains executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
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
String.fromCharCode medium PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically (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.
Suspicious extracted artifact medium 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 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 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://ns.adobe.com/xfdf/
- http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `480a1e9a6934b7257e583f1b9b61f6fe39b0ff00ba2d3f0ad5b27bcdeb2f2d86`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xD7	133 bytes
`embedded_file_obj0010.bin` `d4ff871de6628873a7035e48c3dfa9affd8413c4e514b4f2b79a912efb0ddaf9`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x1A5	712 bytes
`embedded_file_obj0011.bin` `96c27674f45553f0996e07efee0403004b5be0d397aed692dbb6c2f19d76d71e`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x4B8	434 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 0x6B5	323 bytes
`embedded_file_obj0014.bin` `ad06ef3ea6b7a840d79492f94475a25fcedb1d4c28f003b32f95e1d19bcdcf76`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x856	10318 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 0x12DB	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x136F	56 bytes

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