Pdf.Dropper.Agent PDF malware analysis — malicious · 2302d46c12edd526

MALICIOUS

PDF

299.2 KB Created: 2017-11-28 05:04:23 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 2.5.000_PHP4 (http://www.tcpdf.org))

MD5: f0488c7a66b38bb66848717ae6592560 SHA-1: aff062afc904540300d8ddbc4f226eaf698760a0 SHA-256: 2302d46c12edd526f74e94b20e062cddf620e00a0dfad214b6b72e2d164a24b8

90 Risk Score

Malware Insights

Pdf.Dropper.Agent · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV heuristic identified the file as 'Pdf.Dropper.Agent-7239197-0', indicating a known dropper family. The PDF contains an embedded script payload, which is a common technique for delivering secondary malware. The heuristic 'PDF_EMBEDDED_SCRIPT_PAYLOAD' further supports this, suggesting the script is designed to download and execute additional malicious content.

Machine Learning

Nyx PDF Classifier clean score 0.1248

Heuristics 4

ClamAV: Pdf.Dropper.Agent-7239197-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7239197-0
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000c1fd.bin` `a5337ef1f5a0dfe4dc8fa6b4f3ef847a53624800b5928a0eeef5b888ceecaabc`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xC1FD	264072 bytes
`embedded_pdf_script_00049dc5.bin` `0693b2fcfa912f8525f985cfbf61582aadc60724e1dd949f124c82eef4bead46`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x49DC5	306388 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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