Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a9008b30cde65f…

MALICIOUS

PDF

120.4 KB Created: 2007-10-08 00:09:29 Authoring application: PDFCreator Version 0.8.0 (via GNU Ghostscript 7.06)
MD5: 9caad3810451a297edda1ea272828f10 SHA-1: 0ed03875d4af19fd48ae79aaa5c7b938d91b9014 SHA-256: a1a9008b30cde65febcb069d76531365f26819e8b8a3243363c53e6ffdeb3870
364 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File Execution T1204.002 Malicious File Execution: Malicious File T1059 Command and Scripting Interpreter T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF contains embedded JavaScript and a critical PDF_LAUNCH heuristic firing indicates an attempt to execute a Windows executable payload. The PDF_LAUNCH_COMMAND specifically shows the execution of cmd.exe with parameters that suggest it is preparing to run a file, potentially the embedded PE payload. The ClamAV detections further confirm the malicious nature of both the PDF and the extracted artifact.

Heuristics 9

  • 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\\AirFrance.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
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0051_000.js
a505117b12b6e2a37bb474ed31e3c08cb64a035ca61e82186d93bf620b557aa8		 pdf-javascript-stream PDF /JS object 51 at offset 0x1DD82 58 bytes
stream_008_off0000900a.bin
e29c90050edd1d68bd2f8a5db91b0a41caeb6cba3b91669d164fc6b75606507e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x900A 29771 bytes
stream_011_off000130a9.bin
573c1c7d2e602a63175e416158ea05f0434919f49fa12a142c78b703d1103c3c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x130A9 73802 bytes
Detection
ClamAV: Win.Trojan.Swrort-5710536-0
Obfuscation or payload: unlikely
font_00_sfnt_off000044e8.bin
6464a3250425a274fb5721d61a173ae0e617e43106ba68b24ead97e6775c6fa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44E8 8004 bytes
font_01_sfnt_off00005557.bin
d6211a7e046695cb32a4150536c9867442d4cd49a05c25107771c0bb563a71cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5557 13976 bytes
font_02_sfnt_off0000745d.bin
7ca5be7dc78189f1f16272131fd1885d92f23500fa011deabd95f1b3adff9cf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x745D 13680 bytes
font_04_cff_off0000cd04.bin
7afb9724c257779c90138b2e449036dfa6345e2c4a10654f3e12fea4a8444e25		 pdf-font-stream PDF embedded font (cff) at offset 0xCD04 28461 bytes
font_05_cff_off00010a17.bin
936ba1d3029c33ba0d8950e85b87eef5841c92972eb35f758dbdb68fba0301e7		 pdf-font-stream PDF embedded font (cff) at offset 0x10A17 4371 bytes

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