PDF malware analysis — malicious · 2ef5b7b601084c9e

MALICIOUS

PDF

5.0 KB Created: 2012-05-12 13:11:01 Authoring application: Zx9

MD5: 2b3eef663e1ba7ec16af232c25e3ae7f SHA-1: c2538ffa8c2f2ba6cd4c3d64c284c6dad0c2528c SHA-256: 2ef5b7b601084c9ec91afa641aa92329318176b2bc61eb22dc71c38d6461e3d4

142 Risk Score

Malware Insights

The PDF file contains an embedded JavaScript payload that is triggered by the CVE-2010-0188 exploit. The heuristic 'CVE_2010_0188' directly indicates exploitation of this vulnerability. The embedded JavaScript, identified as 'stream_001_off0000031b.js', is likely responsible for further malicious actions, such as downloading and executing a second-stage payload. The PDF structure also indicates the presence of XFA forms and an unescaped stream, common characteristics in exploit documents.

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.
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
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_001_off0000031b.js` `cea9b3ef1bcd604813a68531fb68b47d932b5c7649a88f444296d9f4069d3145`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x31B	44123 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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