Malicious PDF — malware analysis report

Static analysis result for SHA-256 9669d6f125e00ddb…

MALICIOUS

PDF

39.0 KB Created: 2020-03-22 10:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: eccf70f4a533e483fb596de1cfa3b762 SHA-1: 8113d9d966e6a3d7c4225ebf7349275dcf762fc1 SHA-256: 9669d6f125e00ddba50535869dfa22e73fde1489a4a8e74a2a18bcec603de055
96 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF contains a large number of external links to other PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text along with the initial lure URL and metadata, suggesting it's not intended for direct user interaction but rather to host links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://kaitiakisisters.com/uploads/1/3/0/6/130604518/130604518.html#platicas+prebautismales+merida
    • http://kmepc.net/uploads/1/3/0/7/130739313/3257334.pdf
    • http://awomanofexcellence.com/uploads/1/3/0/7/130739456/wobore-buposilo.pdf
    • http://www.pleasantgreenmethodist.org/uploads/1/3/0/5/130551876/2214651.pdf
    • http://whitmancustomdesigns.com/uploads/1/3/0/7/130776895/6286456.pdf
    • http://cmrmeetings.com/uploads/1/3/0/5/130539992/xisiwigufowolalino.pdf
    • http://woodstreamga.com/uploads/1/3/0/7/130775379/5157122.pdf
    • http://chicagoamwa.com/uploads/1/3/0/2/130270799/d7ebc21663323.pdf
    • http://cloudsmoking.com/uploads/1/3/0/4/130490776/3272145.pdf
    • http://tribelle.ca/uploads/1/3/1/0/131071066/soruz-vutolawewis-majitukov-vometanew.pdf
    • http://sdgcoatings.com/uploads/1/3/0/4/130435531/213eb46ddfe6bbb.pdf
    • http://purebreedbengalkitten.com/uploads/1/3/0/6/130620402/wulopuwixixe-laruwizosu-jeriwenejep.pdf
    • http://gabeleegeographyhazard.com/uploads/1/3/0/2/130287992/4659804.pdf
    • http://mx.chillingthemost.com/uploads/1/3/1/1/131164238/junifezavaje.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ce6.bin
bfb4072bcdea8e13defe81524cd6ad7f245f6c42ddb1d75790d2cef19535f585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE6 9172 bytes

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