Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4517d0e2a6d7dc9…

MALICIOUS

PDF

28.9 KB Created: 2017-04-27 00:50:43 -03:00 Authoring application: RAD PDF (via RAD PDF 2.36.6.2 - http://www.radpdf.com)
MD5: 4ac07ce55fc7c3e1dc5cc80f4f8e9307 SHA-1: b25c0b74b8020c5ace605e79dd9939e447b466da SHA-256: a4517d0e2a6d7dc9449f3f7282ea454a35ff840fad9dbde973829d8e9e26b545
88 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains an embedded URL that utilizes a URL shortener (goo.gl). This is a common technique for obfuscating malicious links. The ClamAV detection 'Pdf.Dropper.Agent-6307775-0' strongly suggests the file is a dropper. The presence of XFA forms also indicates a potentially complex PDF structure often used to host malicious content. The primary attack vector appears to be luring the user to click the shortened URL, which likely leads to a secondary payload download or a phishing page.

Machine Learning

  • Nyx PDF Classifier clean score 0.0011

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-6307775-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-6307775-0
  • Clickable URI uses URL shortener medium PDF_URL_SHORTENER_URI
    PDF contains a clickable HTTP(S) action whose destination is a URL shortener. This hides the final landing page from static review and is common in phishing redirect PDFs.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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.radpdf.com)/Creator(RAD
    • http://www.dynaforms.com
    • http://www.radpdf.com
    • http://www.w3.org/1999/xhtml
    • http://www.xfa.org/schema/xfa-data/1.0/
    • https://goo.gl/ZqrG2M
    • 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_off000007e4.bin
66dd86fea641c8f045b81daf4d50e4911e7aabc71843657c36b221cadf38a803		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4 25228 bytes

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