Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1b77fb632184db…

MALICIOUS

PDF

3.3 KB Created: 2005-09-29 09:27:34 UTC Authoring application: Adobe PDF Library 8.0
MD5: fa596c9f42bfb70d7098c235aa3d0003 SHA-1: de3815549210416597ff019eba68f0ee4507d9b6 SHA-256: fa1b77fb632184db5bbc3f1d3107271aae94a9d60488d04f3e931b85381de948
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and an embedded file, indicating a malicious intent. A critical heuristic firing identified the CVE-2010-0188 exploit for Adobe Reader's LibTIFF XFA image handling. This exploit is used to execute arbitrary code, likely to download and run a second-stage payload. The embedded file and JavaScript are consistent with exploit delivery mechanisms.

Heuristics 6

  • 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.
  • 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.
  • 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.
  • 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
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0004.bin
f142b6b01ed4f3d889c9bbe3e35c84cf75f4073824fa8deb9424a6bbce2af1d4		 pdf-embedded-file PDF EmbeddedFile object 4 at offset 0x1C6 35879 bytes

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