PDF malware analysis — malicious · cfcb8fd1cf813f3b

MALICIOUS

PDF

5.1 KB Created: 2012-05-12 13:11:01 Authoring application: Bcs2

MD5: 23fe67c3a5e816354d46a6c691de2871 SHA-1: 579229a3d852a04b68df93899a0a882c75e00b96 SHA-256: cfcb8fd1cf813f3bcb06ac373f5e516fe49902e8a1b1a0fefb63ac6a98c9123e

142 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.001 PowerShell

The PDF file contains a critical vulnerability exploit for CVE-2010-0188, targeting Adobe Reader's handling of XFA forms. The heuristic 'PDF_UNESCAPE' indicates obfuscated JavaScript within a PDF stream, which is further confirmed by the 'EXTRACTED_FILE_STATIC_TRIAGE' indicating a JavaScript payload. This script is likely responsible for downloading and executing a second-stage payload, as suggested by the embedded artifact 'stream_001_off0000031a.js'.

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_off0000031a.js` `f020f86eae676c50b5c48fe9f545e19ad757d2806b614ad311630f042dc0df71`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x31A	44306 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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