PDF malware analysis — malicious · 7d2b1f8800711f1e

MALICIOUS

PDF

7.7 KB Created: 2012-04-17 19:53:38

MD5: 9becc15d6f754ad3b6d35935fc0c40ac SHA-1: 5a4c9d90e3d0e97cf6b1c307e682d5f1b7902d93 SHA-256: 7d2b1f8800711f1e140270d83881bd0698ce70d91f21a290d656d01e5bc0ac8e

128 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-156969-1', and an ML classifier indicating a high probability of maliciousness. The presence of an embedded script payload and an embedded file suggests the document is designed to exploit a vulnerability, likely leading to the download and execution of a secondary malicious payload. The document body text is heavily garbled and truncated, providing no clear user-facing lure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Dropped-156969-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-156969-1
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Suspicious extracted artifact info 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_file_obj0008.bin` `e14607be0cdfa8cc58d6ca64c7c7bb077afbd173d063c97b75cab07e4d214517`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xBAF	7163 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 long base64-like blob(s).

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