PDF malware analysis — malicious · caca696d55cc3942

MALICIOUS

PDF

6.0 KB Created: 2012-10-18 11:51:53 Authoring application: kkiiia=unescape(nehet.replace(/jjsjff/g, niittu.charAt(4

MD5: eddc3726afbe013dd777c08ada037acc SHA-1: bffbff3bde686ccb53f87b9850bddde1f7217acc SHA-256: caca696d55cc3942a759a204e613dc63a1d8db425d235a3682a17c4c8f5d0699

202 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell T1190 Exploit Public-Facing Application

The sample is a PDF file that exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. The heuristic firings indicate the presence of an unescape() call and an embedded script payload, both commonly used in PDF exploits. ClamAV also detected this as Pdf.Exploit.Gen-259. The exploit likely leads to the execution of arbitrary code, as suggested by the embedded file and the nature of the CVE.

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: Pdf.Exploit.Gen-259 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Gen-259
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0006.bin` `c09ae753ce4962d3d447f6ccdc05236eb9238277b66775a82f085f0fd265a84d`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x257	130 bytes
`embedded_file_obj0016.bin` `b31ba2488d4b3135a8e46cab65fb084ce05ccf950541fd51bbc0d2a9c53d0053`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x4BA	101 bytes
`embedded_file_obj0001.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x584	77 bytes
`embedded_file_obj0018.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0x62E	56 bytes
`embedded_file_obj0004.bin` `d4d42ce0e2becf87abd24a70143a95b67bb3633a77c6bfce0204f49023ee7cd4`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x735	201 bytes
`embedded_file_obj0015.bin` `6b94304ad8e070787d2849e4244bc1f469cf8f325705860f250a835a7613cc4b`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xA90	35140 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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