PDF malware analysis — malicious · 558ba625be62f07b

MALICIOUS

PDF

1.9 KB

MD5: 51fa64c084cfe0b08c8454a62815e563 SHA-1: a87c2712741205e501856d6ef28260e89136756f SHA-256: 558ba625be62f07b3ab779ab7b95ca9fb9902de94380186d8c1533cba07e4bb0

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.003 Windows Command Shell T1204.002 Malicious File

The PDF file contains a critical PDF_LAUNCH heuristic firing, indicating an attempt to launch an executable. This is further supported by a PDF_LAUNCH_COMMAND heuristic targeting cmd.exe with parameters that appear to be the start of a JavaScript payload. The embedded script attempts to download a file named 'Adobe_Flash_ActiveX&Plugin.exe' from 'http://www.jason10.0fees.net/install.jpg' using ActiveX objects and save it, likely for execution. The SE_LOLBIN_RUN_COMMAND heuristic confirms the presence of instructions involving Windows execution tools.

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 var w=new ActiveXObject("WScript.shell"' — 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.
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
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://www.jason10.0fees.net/install.jpg

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_000002f3.bin` `e6bd2162d94360913d5198e9bbf5e0717baf4b03fa177d87df929063779e907f`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x2F3	47 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s).

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