PDF malware analysis — malicious · 1e70058128ebfff6

MALICIOUS

PDF

199.7 KB Created: 2010-04-29 15:07:36 Authoring application: PScript5.dll Version 5.2.2 (via GPL Ghostscript 8.15)

MD5: a705a3c98e488a39bdd4c17bf51d2f0d SHA-1: 1a681de45fcefd24f91b718c0efc55eb63e8e88d SHA-256: 1e70058128ebfff634a453483dd48cc4e929bda17e960d1d5c0e2b7722ca017a

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains a launch action that executes cmd.exe with parameters to create and run a VBScript file named 'temp_system321.vbs'. This script is likely responsible for downloading and executing a secondary payload. The PDF structure and the presence of embedded scripts indicate a malicious intent to compromise the user's system.

Heuristics 4

Launch action critical PDF_LAUNCH

PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
/Launch action target: cmd.exe critical PDF_LAUNCH_COMMAND

PDF /Launch action specifies an executable target with parameters '/c echo Dim BinaryStream > temp_system321.vbs && echo Set BinaryStream = CreateObject("ADODB.Stream"' — references a known-dangerous executable (cmd, PowerShell, etc.).
Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
Suspicious extracted artifact medium 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.

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_015_off0001055e.bin` `e71b6112e0e54b7a6d267a5abab904da471d04250363a0012e7b07bd17b5c2a3`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1055E	2097 bytes
`embedded_pdf_script_00012684.bin` `cc4918e55f90704419b4767e6f2c53520a6ce81f9551974d42dbf96c83c0ddc1`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x12684	204442 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 shell/COM execution token(s). Carved artifact contains 1 long base64-like blob(s).
`font_00_cff_off0000b0fd.bin` `92e8001e7cf64f7f03513e28099e89d51002655e1aed105c0374ae732501737d`	pdf-font-stream	PDF embedded font (cff) at offset 0xB0FD	261 bytes
`font_01_cff_off0000b252.bin` `40762b4986d8e7457b7925c1472440ca8a0682c28592650ff9fcd11ac8d63373`	pdf-font-stream	PDF embedded font (cff) at offset 0xB252	9106 bytes
`font_02_cff_off0000e9d2.bin` `ef6583db838270c6bd4221df1eb41e2d1a1e5481587d468e4c1399c240dc0780`	pdf-font-stream	PDF embedded font (cff) at offset 0xE9D2	4330 bytes
`font_03_cff_off0000fa06.bin` `ff7ac64d6932d8268786117c103e5d2e4e15e3d69d7d08ea5f87f9d7a580a45e`	pdf-font-stream	PDF embedded font (cff) at offset 0xFA06	3088 bytes

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