Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc6c360bd71b968…

MALICIOUS

PDF

468.3 KB Created: 2009-02-13 12:48:22 -08:00 Authoring application: Acrobat PDFMaker 8.1 for PowerPoint (via Acrobat Distiller 8.1.0 (Windows))
MD5: ec6d397e796300bc5a5086e21a362f83 SHA-1: 77d5ddc03dec7f906254abd0040cafc104864792 SHA-256: afc6c360bd71b968dc678703ecf7e51a87a347c80274e2020665eee3ad1a1291
416 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

This PDF file contains embedded JavaScript and a critical PDF_LAUNCH heuristic firing, indicating an attempt to execute arbitrary code. Specifically, it leverages CVE-2010-1240 to launch cmd.exe with parameters that suggest an attempt to download and execute a secondary payload. The presence of an embedded PE payload further supports this. The ClamAV detection of 'Pdf.Tool.Agent-1388586' also confirms its malicious nature.

Heuristics 13

  • Adobe Reader Launch action command execution critical CVE exact CVE_2010_1240
    PDF uses the Adobe Reader/Acrobat Launch action pattern associated with CVE-2010-1240: cmd.exe is invoked with attacker-controlled parameters, paired with an embedded/exported payload.
  • CCITTFaxDecode + TIFF/XFA exploit prep — LibTIFF CVE-family indicator high CVE related PDF_CCITT_CVE_2010_0188_RELATED
    PDF uses /CCITTFaxDecode together with TIFF/XFA exploit-preparation markers such as rawValue image-field assignment, TIFF data, or heap-spray JavaScript. This matches the delivery pattern for Adobe Reader LibTIFF/CCITTFax parser exploit families, including CVE-2010-0188, but does not prove the exact malformed TIFF primitive.
  • Launch action critical PDF_LAUNCH
    PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
  • Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOAD
    PDF stream bytes contain an embedded Windows executable with a verified PE header. Exploit chains often hide droppers inside ordinary streams rather than standard /EmbeddedFile attachments.
  • /Launch action target: cmd.exe critical PDF_LAUNCH_COMMAND
    PDF /Launch action specifies an executable target with parameters '/Q /C %HOMEDRIVE%&cd %HOMEPATH%&(if exist "Desktop\\i:\tmp\1.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
  • ClamAV: Pdf.Tool.Agent-1388586 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Tool.Agent-1388586
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • 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
  • Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT
    Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser exited 1. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://ns.adobe.com/pdf/1.3/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdfx/1.3/

Extracted artifacts 12

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj1106_000.js
36234c503681564b610020290c2e8b357fe26b950e425d7601c1ead628ce5124		 pdf-javascript-stream PDF /JS object 1106 at offset 0x74B11 55 bytes
stream_071_off0002e2ab.bin
68205f1c3f146b062e4d7780106926692ab5301031e80b9afadef65951da24c7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E2AB 491640 bytes
stream_127_off00069ed8.bin
048806cf1d2d78a5c4cd8eca3570f3c14aeded1dfc42c77fc608a6f7ace64135		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x69ED8 73802 bytes
icc_00_off00001331.icc
2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e		 pdf-icc-profile PDF ICC profile at offset 0x1331 3144 bytes
font_00_sfnt_off0003f3e3.bin
0b33fcc8c08f482278089f5766e59a5d47d3f2473cf3bc473663d57ebec59e9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3F3E3 6144 bytes
font_01_sfnt_off00040742.bin
eac0371e1e47735dcf5c801c56d2ecaef6a04beb808e1f36bae28ee877287589		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40742 44796 bytes
font_02_sfnt_off00045162.bin
279ce95d783f25347fdc73885d5c0dca1e2e66aa3450dbee5d5e2e6031f2e02b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45162 48880 bytes
font_03_sfnt_off0004a59e.bin
36839aa08cb45fd98ba052814fc4b5ef465d1ee9eca339140fdf6be64404a60b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A59E 64212 bytes
font_04_sfnt_off00051e1e.bin
7b807c093e783c829dad69c6ba8d4633ddd07583bd5441119e7142d5f5da17b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51E1E 50188 bytes
font_05_sfnt_off0005752d.bin
fe16804332b9d22da12cb9056f6647823f2b681621eea7b9bdcdfeca7b86d707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5752D 35700 bytes
font_06_sfnt_off0005a18d.bin
0da5d833377b25d6d9f12684ea9fccb5a77df46ec895143da554fc762e51f1f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A18D 36744 bytes
font_07_sfnt_off0005d2ba.bin
fecdd3e4c12749eab449a48cac1aeab791f1bbd4c11c1d742967d6568729e71b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2BA 6032 bytes

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