Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca07d98196b842b…

MALICIOUS

PDF

123.2 KB
MD5: c46ed73b7769fdb7947a103660a63035 SHA-1: 221ab5ebc9d4bc436ecdc66b7eab1af84f6f09c4 SHA-256: 4ca07d98196b842b78b79c19b132aa8d2a0f0fb4a5f86ebb5de9af5d2787c672
80 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: User Execution T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file is identified as malicious due to its structure, which resembles a screenshot lure designed to trick users into clicking a link. The critical heuristic 'PDF_DIRECT_PAYLOAD_LINK' confirms that a link within the document points directly to an MSI installer hosted at 'https://adobeacrobatup.com/AdobePDQ5.6.1.msi'. This indicates the document's primary purpose is to deliver a malicious payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0782

Heuristics 3

  • PDF link points directly to executable/archive payload critical PDF_DIRECT_PAYLOAD_LINK
    PDF contains a clickable HTTP(S) URI whose path ends in an executable, script, shortcut, disk image, or archive extension. Documents can legitimately link to installers, so this is a high-risk delivery indicator rather than a standalone exploit fingerprint.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 123 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.pdf-tools.com
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00000970.bin
a71afd1f67ec06c928131800641e033ce04653d1e171dfdeda0cc39ece69f3dd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x970 140418 bytes

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