PDF malware analysis — malicious · 01f2da48288dc0ca

MALICIOUS

PDF

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

MD5: 29530af785d912fb0d6ba83b7fd05723 SHA-1: d12d6847fbb8a5b85578c325ac05c04f2e9d480b SHA-256: 01f2da48288dc0caacde031405fcf9d99f5ebc98958c2a350b2e1f6a36cf25c9

338 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains critical XFA heap spray exploit code targeting CVE-2010-0188, a known vulnerability in Adobe Reader's LibTIFF handling. This exploit is designed to allow arbitrary code execution, and the presence of embedded scripts and an embedded file suggests it is used to download and execute a secondary payload. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 11

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 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.
XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY

PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
ClamAV: Pdf.Exploit.Dropped-81 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xF89	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x103A	228 bytes
`embedded_file_obj0010.bin` `be300394d31f4b11bf4825653ddc7e940bb68953e838b65a3b8dc0554bd8423e`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x112E	4476 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x1A3D	199 bytes
`embedded_file_obj0012.bin` `d5c0be04c46ac1f7d523d955a6ab8aa50363e08076e63efedca0b5538dd14672`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x1B2F	131 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x1BEF	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x1C96	56 bytes

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