Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef72d8379f34899…

MALICIOUS

PDF

36.2 KB Created: 2020-04-19 08:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9cd3ee30def23fce338b1594df0b7ea6 SHA-1: 50dbc8c6332257da78dbe260f8e3fc73a2649f25 SHA-256: 3ef72d8379f34899068c88b2ec30d162af60d44f30b597bb82b28022be41ef8f
92 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier and exhibits characteristics of a link farm. It contains numerous external links to various domains, all structured similarly with numeric slugs in the path, suggesting an attempt to manipulate search engine results or redirect users to potentially harmful content. The presence of the 'PDF_SEO_LINK_FARM' heuristic further supports this assessment. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://richardmaths.com/uploads/1/3/0/3/130379114/130379114.html#more+mbelede+video
    • http://leeslawnmowerandsmallenginerepair.com/uploads/1/3/0/7/130775867/8439946.pdf
    • http://dunishasanctuary.com/uploads/1/3/1/0/131069886/339360.pdf
    • http://ilihomenaxos.com/uploads/1/3/0/8/130814133/29b054dc13.pdf
    • http://bellquality.com/uploads/1/3/0/4/130483629/3568488.pdf
    • http://greagsubject.com/uploads/1/3/0/6/130605510/d0a552afe.pdf
    • http://heavensmattress.com/uploads/1/3/0/3/130313305/nilunixelex_zudusa.pdf
    • http://youareloved.app/uploads/1/3/0/8/130873850/zunonigufumozuj-gikuturoda-momuduzaliwobix.pdf
    • http://konaweddingsandevents.com/uploads/1/3/1/0/131071056/2694331.pdf
    • http://tropicsofhaiti.com/uploads/1/3/0/5/130551067/8397226.pdf
    • http://mabakersfield.com/uploads/1/3/0/6/130620290/wimixolu.pdf
    • http://newimagesfencing.com/uploads/1/3/0/7/130776008/midajod.pdf
    • http://butterflycleaningservice.com/uploads/1/3/0/7/130738723/c944e8f3.pdf
    • http://kushproduction.com/uploads/1/3/0/4/130489650/sipeporifuzujubav.pdf
    • http://genevievedreizen.com/uploads/1/3/1/4/131406544/a84a242e36f.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_off000063c2.bin
503e853535824139f7ed35f109d2c9883d45f619944286aa2693d7f2e099a264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C2 8588 bytes

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