Pdf.Dropper.Agent-7275395-0 — PDF malware analysis

Static analysis result for SHA-256 7ab35962f2b736d7…

MALICIOUS

PDF

289.4 KB
MD5: 261aa03dd13f35cf06939f825a9b80bf SHA-1: 25eca6e504d5600343cf22d1ca8ae61db2785063 SHA-256: 7ab35962f2b736d773c6d050642f8f3f5b144c13847c066036197b876102b206
250 Risk Score

Malware Insights

Pdf.Dropper.Agent-7275395-0 · confidence 95%

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF contains obfuscated object names and a launch action that triggers an embedded script. This script is identified as a dropper by ClamAV and exhibits characteristics of malicious behavior, including hex escape obfuscation and script execution terms. The embedded script likely downloads and executes a second-stage payload, as indicated by the PDF_LAUNCH heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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: Pdf.Dropper.Agent-7275395-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7275395-0
  • Hex-obfuscated structural name object high PDF_OBFUSCATED_NAME_OBJECT
    A structurally-dangerous PDF name (e.g. /OpenAction, /Launch, /AA, /EmbeddedFile, /SubmitForm) is written with #XX hex escapes to evade string-based scanners. Legitimate producers write these names literally; hex-encoding them is a deliberate obfuscation technique.
  • 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.

FilenameKindSourceSize
embedded_pdf_script_000482d8.bin
99fc75655bbfdff357afc0e093f2ed188f4280ae4788b0b330fbb9a895060507		 pdf-embedded-script PDF decompressed stream script payload at offset 0x482D8 296229 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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