Malicious PDF — malware analysis report

Static analysis result for SHA-256 bccaffaeb577f4ef…

MALICIOUS

PDF

122.1 KB Created: 2017-01-27 10:29:28 +01:00 Authoring application: RAD PDF (via RAD PDF 2.38.3.1 - http://www.radpdf.com)
MD5: 6365d8f3ccce7b7056533b0fee6bd9c9 SHA-1: 90f66c93a88cdf2eddb4ca2156e9c485e42614e9 SHA-256: bccaffaeb577f4ef6e7ce2ad33b83a1abb10fb6456aa668db256d951e5d9ee4d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, disguised as document content, that point to ZIP archives and an executable file hosted on Dropbox. The heuristic PDF_REPEATED_PAYLOAD_LINK_LURE specifically indicates that these invisible links are designed to deliver a payload. The ML classifier and ClamAV detection further support the malicious nature of this PDF, classifying it as a dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9151

Heuristics 3

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • ClamAV: Pdf.Dropper.Agent-7217114-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7217114-0
  • 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 https://www.dropbox.com/s/q2pxyat76300fhz/BANK%20DRAFT%20COPY1.zip?dl=1
    • https://www.dropbox.com/s/2upqdnjeozomqs0/SwiftMessage.exe?dl=1
    • https://www.dropbox.com/s/agumqywj9ena1ks/PAYMENT%20ADVICE%20REF.zip?dl=1
    • https://www.dropbox.com/s/33978tr8pcw0w9j/REMITTANCE%20ADVICE%20REF.zip?dl=1
    • http://www.radpdf.com)/Creator(RAD
    • http://www.dynaforms.com
    • http://www.radpdf.com
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000007cf.bin
211db2fe9b00da0769dc17e36faecacd3316fd1da82722127767ca9a55753e64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF 98205 bytes

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