PDF malware analysis — malicious · f4175984ed82171e

MALICIOUS

PDF

5.3 KB Created: 2011-04-05 23:46:28 Authoring application: bub lob

MD5: 234345735a4a1c43ce1ed36635e957a0 SHA-1: 0232140ec7375b8220046e4f75af7479aef957de SHA-256: f4175984ed82171ee61fc5fd86c65e1baece82d263f365c4c744f71c7a61bb40

140 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains an embedded JavaScript payload that exploits CVE-2010-0188, a vulnerability in Adobe Reader's handling of LibTIFF images within XFA forms. The critical heuristic firing confirms this exploit. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although its exact actions are obfuscated. The file's metadata indicates it was authored by 'bub lob', a common indicator for malicious documents.

Heuristics 6

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.
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
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_001_off00000327.js` `20479ea8c936826d6544b7a6cc5f0331ad1099b7f9c47264a987b3b0150e4d90`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x327	50059 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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