PDF malware analysis — malicious · 879f5fde93fe9c94

MALICIOUS

PDF

61.4 KB Created: 2012-06-11 17:19:01 Authoring application: u417

MD5: 861109d13a7e33d162454e56c6e0e85b SHA-1: d6b66f00fd96ef322e8241e219df10fb2e100eb8 SHA-256: 879f5fde93fe9c94cdec09cdaa8bbd72050a7772988563703d226bafca05e1ea

240 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell T1059.003 Windows Command and Shell

This PDF file exploits CVE-2010-0188, a vulnerability in Adobe Reader's handling of XFA forms, to execute a malicious script. The embedded JavaScript payload is obfuscated but appears to be designed to download and execute a second-stage payload. The presence of the CVE-2010-0188 exploit and the embedded script strongly indicate malicious intent.

Heuristics 10

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.
XFA form contains executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
ClamAV: Pdf.Exploit.Dropped-97 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-97
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://ns.adobe.com/x
- http://�wt.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off0000031f.js` `68630e9fa3849cb1506baf5aa63527afbe137c6b51fc786d3371349f9af00d54`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x31F	61128 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).
`embedded_pdf_script_00000628.bin` `09d5adf327990dbb3dd6f494baec0a1fac3af9497937abc4d410b3fbb2040f55`	pdf-embedded-script	PDF raw stream script payload at offset 0x628	61428 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 306 long base64-like blob(s).

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