Malicious PDF — malware analysis report

Static analysis result for SHA-256 e899a4dad5b47893…

MALICIOUS

PDF

38.4 KB Created: 2020-03-26 03:58:58 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c0a2c4d33236fc3def62395c75cf61a8 SHA-1: f1e969d12694753d3db20a5ffbe78c18c4abfd5f SHA-256: e899a4dad5b478935acc5edbeb11aa6165a08d4e4f9965691a6a24e0d14d9110
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, a technique often used for SEO manipulation or to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The primary attack pattern involves a link farm designed to drive traffic to a network of SEO-optimized PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://delgeinc.com/uploads/1/3/0/2/130289682/130289682.html#how+to+draw+a+boy+sitting+cross+legged
    • http://relst-uhag66.com/uploads/1/3/0/7/130775341/9feed2.pdf
    • http://www.effectivemobiledjservice.com/uploads/1/3/0/5/130544953/rinigarekozif-dosupexureta-lotije.pdf
    • http://westsidedolphins.com/uploads/1/3/0/6/130621022/bbca962.pdf
    • http://thisisinnovation.com/uploads/1/3/0/4/130435927/jiragak-gugugasodobake-bezoxup-jilisesi.pdf
    • http://passantefinancial.com/uploads/1/3/0/2/130271171/4d20101.pdf
    • http://gemdes.space/uploads/1/3/1/0/131070258/kibuv.pdf
    • http://titanpreservationlawnservices.com/uploads/1/3/0/4/130475997/3547da8.pdf
    • http://bravesblog.com/uploads/1/3/0/2/130271094/6867972.pdf
    • http://kids-community.org/uploads/1/3/0/8/130813921/monazuse.pdf
    • http://parentandbabysvcs.com/uploads/1/3/0/7/130740458/1fc3c034.pdf
    • http://richmond-math.com/uploads/1/3/0/7/130775383/7517839.pdf
    • http://fergusonscottagesupply.com/uploads/1/3/0/5/130588907/jupamalapepu.pdf
    • http://annmgaffney.com/uploads/1/3/0/2/130287407/4503022.pdf
    • http://eyeopticsoptometry.net/uploads/1/3/0/9/130969510/vejigadoki-pawasosokosow.pdf
    • http://theabledbobcatandkittyprogram4empoweringstudents.com/uploads/1/3/0/2/130272554/3732106.pdf
    • http://hostmaster.beautyandthebuddha.com/uploads/1/3/0/8/130874065/4176208.pdf
    • http://saigonapartmentcenter.com/uploads/1/3/0/5/130551249/tujedaxapew.pdf
    • http://www.islandclubreccenter.com/uploads/1/3/0/4/130489377/nodavitokuzowo.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_off00006ed7.bin
a73d7ccc5b036cdc5ca1eccaef0c32b9bb8a0971731316e2d04cb23f9a8d3c5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED7 7492 bytes

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