PDF malware analysis — malicious · 028b20479eed6c1e

MALICIOUS

PDF

6.2 KB Created: 2012-09-25 16:23:06

MD5: 6aec3ae64c1517b8a97abfae5972b339 SHA-1: b5f20e45dba53b4ea3f4e5087fd28f508937d4cf SHA-256: 028b20479eed6c1eabbec3a2d0cded8791f6bc8dbebbdca31c4dfe821f06f0ec

238 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains an embedded exploit targeting CVE-2010-0188 in Adobe Reader's XFA forms. The ML classifier and ClamAV detection strongly indicate malicious intent, flagging it as Js.Exploit.Pdfka-2. The exploit likely serves to download and execute a secondary payload, as suggested by the embedded script payload marker.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

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.
ClamAV: Js.Exploit.Pdfka-2 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Js.Exploit.Pdfka-2
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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.
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/xfa-data/1.0/
- http://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0017.bin` `c09ae753ce4962d3d447f6ccdc05236eb9238277b66775a82f085f0fd265a84d`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x200	130 bytes
`embedded_file_obj0011.bin` `7a63478cb2693c43c4c0db648b0cf67c34aff38833a0a757fdcc6de0e7517f43`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x2D5	127 bytes
`embedded_file_obj0003.bin` `d4d42ce0e2becf87abd24a70143a95b67bb3633a77c6bfce0204f49023ee7cd4`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x5FF	201 bytes
`embedded_file_obj0016.bin` `4e7247d5494886f3c686ffc9dd17a69f3874a19abe92d58d8aa4e56059245017`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x8E7	38356 bytes
Detection ClamAV: Js.Exploit.Pdfka-2 Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`stream_002_off00000380.bin` `f09b43b62cbb6aaaa0439ebdb3b996a3c65ab888aa8369ad3dd34d516eff7432`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x380	558 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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