PDF malware analysis — malicious · 5b316e0aa0202083

MALICIOUS

PDF

5.8 KB Created: 2012-06-22 15:04:16 Authoring application: nyhed=oortfa(jyyas.replace(/fgje24j/g, arase.charAt(5

MD5: 8720c4e46e7035e7147d98cdba6aab1f SHA-1: cfcdd1dbbb721030e23cbf496bda2cb6284dc5fa SHA-256: 5b316e0aa02020832c12bb2c0b2297fc244bbd8036f9bb4f28534a8ee65b7de8

120 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains an embedded exploit targeting CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. This exploit is designed to execute a malicious payload, likely downloaded from an external source or embedded within the PDF itself. The ML classifier strongly indicates malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 7

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.
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 script payload in PDF stream low 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.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://ns.adobe.com/xfdf/
- http://www.xfa.org/schema/xfa-form/2.8/
- http://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0007.bin` `c09ae753ce4962d3d447f6ccdc05236eb9238277b66775a82f085f0fd265a84d`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x252	130 bytes
`embedded_file_obj0011.bin` `9a9bf23560a51586bedfadaa4033ffe15cc6bc8b540dad806bd67659705d00cc`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x48B	90 bytes
`embedded_file_obj0005.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x54A	77 bytes
`embedded_file_obj0009.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x5F3	56 bytes
`embedded_file_obj0017.bin` `d4d42ce0e2becf87abd24a70143a95b67bb3633a77c6bfce0204f49023ee7cd4`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x6FC	201 bytes
`embedded_file_obj0018.bin` `3554b40b74fc35c6961729402df567583874e26b3043de2c84a55ca3fd3d1967`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0xA00	39385 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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