PDF malware analysis — malicious · aa428dcb2b169f40

MALICIOUS

PDF

6.2 KB Created: 2012-09-24 19:06:10

MD5: 8213e21003af061c2df3807e05688143 SHA-1: f9553383872b84a74f4e319c3e72ae5cd92b8a5b SHA-256: aa428dcb2b169f409a015707864eb884c5dd0fe11803be835650c853548ca9a6

218 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.001 PowerShell

The PDF file contains an embedded script payload and exploits CVE-2010-0188, a known vulnerability in Adobe Reader's LibTIFF component. ClamAV detection as Js.Exploit.Pdfka-3 further confirms its malicious nature. The embedded artifact, likely the second-stage payload, was also flagged by ClamAV. The primary attack vector is exploitation of the client's PDF reader.

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.
ClamAV: Js.Exploit.Pdfka-3 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Js.Exploit.Pdfka-3
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 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.

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0004.bin` `c09ae753ce4962d3d447f6ccdc05236eb9238277b66775a82f085f0fd265a84d`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x1FF	130 bytes
`embedded_file_obj0002.bin` `63b7cc9ca1c48c660679aa262bf3e1fa872b4941eb35801de6c2c4e7d410bd11`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x2D4	129 bytes
`embedded_file_obj0003.bin` `d4d42ce0e2becf87abd24a70143a95b67bb3633a77c6bfce0204f49023ee7cd4`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x5F6	201 bytes
`embedded_file_obj0001.bin` `98c4e4900944e257b65baf73b585c2171710a67e0e0b5f1d0a122431762e0d33`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x8E5	38432 bytes
Detection ClamAV: Js.Exploit.Pdfka-3 Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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