Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58ece656b7c9f4b…

MALICIOUS

PDF

235.2 KB Created: 2010-02-23 12:29:53 -08:00
MD5: fd7621ea1e576f5cc7d02ac2b120d63b SHA-1: edab368ed5edda0ab6f339a57bb2f2573c248b8e SHA-256: c58ece656b7c9f4b377ee8fc884ba2f5a20340153ef65d8cba319860f1385a3d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1059.001 PowerShell

The sample is a PDF document that contains critical heuristic firings for XFA JavaScript heap-spray exploit code (CVE_2010_0188) and an embedded JS stream. The presence of an XFA heap-spray exploit indicates the document is designed to trigger a vulnerability in Adobe Reader. The PDF also contains embedded files and scripts, suggesting it acts as a dropper for further malicious activity. The document's structure and size are typical of a phishing lure.

Heuristics 10

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains XFA image data with an inline crafted TIFF payload and shellcode/delivery markers. This is the data-bound variant of the CVE-2010-0188 Adobe Reader LibTIFF/XFA exploit shape.
  • XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY
    PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 1 text block(s), carries a click-outward action, and is only 235 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.4/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0002.bin
c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb		 pdf-embedded-file PDF EmbeddedFile object 2 at offset 0x19FA 85 bytes
embedded_file_obj0003.bin
0cae1494b9c99505bf126e683a1a8be36bc8d5e793ab829e266d6e2fd62ccac3		 pdf-embedded-file PDF EmbeddedFile object 3 at offset 0x1AAC 1466 bytes
embedded_file_obj0004.bin
ebf0e9b5ecf5464f669592acf48677cbb689213a1bfc1df711ff40a052636c84		 pdf-embedded-file PDF EmbeddedFile object 4 at offset 0x1D6B 9168 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 long base64-like blob(s).
stream_002_off000003e1.js
f574e4d51594d1a8fd22e125b109b827c437aa898edc78babb62dbb93f8744f8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3E1 1532 bytes
stream_004_off0000112a.bin
8358d835225babc82acbcbbf2cb07512b8fb3772c5b46ff5956d2c6d02da8c39		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x112A 3024 bytes
embedded_pdf_script_00034a58.bin
964b35fd2cf89dd55c1ec763fabaa19e720fcce510e60402ad1e45eecd2754e0		 pdf-embedded-script PDF raw stream script payload at offset 0x34A58 9163 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 long base64-like blob(s).

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