Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeef34656dc145c6…

MALICIOUS

PDF

766.9 KB Created: 2012-10-10 09:41:42 -04:00
MD5: 8f7ba30b7c5ba4349caf498665169240 SHA-1: 670f2b78aaa360865dab1d7cbdf272116a4bb897 SHA-256: eeef34656dc145c617b5e5246eee14b8a7769275b7f8c1f64bc108fa7cdd5838
128 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and a Windows executable payload, indicating a malicious intent to exploit vulnerabilities and deliver malware. The presence of JPXDecode and a JavaScript action points towards exploitation of known PDF vulnerabilities, likely CVE-2018-4990. The embedded executable payload is the primary indicator of malicious activity, suggesting the document is a dropper.

Heuristics 7

  • JPXDecode + active content — JPEG2000 CVE-family indicator high CVE related PDF_JPX_CVE_2018_4990_RELATED
    PDF uses /JPXDecode (JPEG2000) alongside JavaScript, XFA, or RichMedia indicators. This matches the delivery pattern for Adobe Reader JPEG2000 parser exploit families, including CVE-2018-4990, but does not prove the exact malformed JP2/JPX primitive.
  • 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.
  • 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)
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload (matched inside decoded stream)
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00000c93.js
61ae6488b844c0e60a62ab9c58d56ce9323f0522b816d50a9cdcaca2bcf0ff30		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC93 7295 bytes
stream_024_off0000702f.bin
d062f0349c1eac20e128ac0f868c2ea26a2b48309cf6215dfe1b37f8bc4aa7d3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x702F 53248 bytes
stream_025_off0000c1da.bin
4435382af26cbf88a9eb186f2b7a156c1f4ede353d96f9604b93c5746462c33c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC1DA 127280 bytes
font_00_cff_off000041f6.bin
46d6cefde37d45d18fcc5c29216199cff91c0e64b0a4892dc2e1aa4d3a90f4b5		 pdf-font-stream PDF embedded font (cff) at offset 0x41F6 2466 bytes
font_01_cff_off00004cc5.bin
8c6b806d6b4dbadc63b2abff6201ac51cb5e88f43d6bacc387340cd039ec4f43		 pdf-font-stream PDF embedded font (cff) at offset 0x4CC5 1671 bytes

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