PDF malware analysis — malicious · 1fecd56cea964dc5

MALICIOUS

PDF

244.6 KB

MD5: 94df5e3af5dee1160099b54631c58fe4 SHA-1: 04c36e35e22c65b0049ff2b0b76899f53d95ac03 SHA-256: 1fecd56cea964dc507989802a02ee4b27f26c099167532f0d4364fc5ac6003b2

300 Risk Score

Malware Insights

MITRE ATT&CK

T1059.003 Windows Command Shell T1204.002 Malicious File

The PDF file contains a launch action that executes cmd.exe, indicating an attempt to run a command-line payload. This is further supported by ClamAV detections for a Trojan Dropper. The embedded script payload is likely responsible for downloading and executing a second-stage payload, though its exact function is obscured by the PDF structure.

Heuristics 6

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 Set fso=CreateObject("Scripting.FileSystemObject"' — references a known-dangerous executable (cmd, PowerShell, etc.).
ClamAV: Win.Trojan.Dropper-132 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Dropper-132
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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_0003cc93.bin` `43c32c0695ffbfb3dc71c4378a0138798afe28dbfc1e2fe27c1f05a98f72248a`	pdf-embedded-script	PDF raw stream script payload at offset 0x3CC93	248958 bytes
Detection ClamAV: Win.Trojan.Dropper-133 Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).

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