PDF malware analysis — malicious · 540bb1ee26693a57

MALICIOUS

PDF

289.5 KB

MD5: 9181b737ba535261ba6060c11b3a1cb0 SHA-1: 52f12d491daca918209397682aea9d9c2c3647d1 SHA-256: 540bb1ee26693a570fe718af1f5fe2dc85a793453e181f55b60a9517d3ce62e5

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains an embedded script payload, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The extracted command line suggests an attempt to execute a script, likely for downloading and running a second-stage payload. The CLAMAV_DETECTION heuristic further confirms its malicious nature. The specific script content is too obfuscated to fully determine its actions, but the overall pattern points to a downloader.

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
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_000482ff.bin` `9c054cb684100e617250fda173981e2238c828d93102662167eb3c8da89d8ad2`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482FF	296317 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s). Carved artifact contains 1 long hex-escaped blob(s).

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