Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47c6258826748a8…

MALICIOUS

PDF

75.4 KB Created: 2021-09-13 04:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: c1d5479109ac500ee954fefc12a7306d SHA-1: ffe5f64525133d25c02bd21c71375a184333ae41 SHA-256: d47c6258826748a860c1b1d18e2b65a30741245bd9e6e13bea22a96f880cec5d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, with many hosted on disposable domains, indicating a link farm or redirection strategy. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the structure and numerous external URLs suggest it is designed to lead users to potentially harmful content or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://esebtekstil.com/resimler/files/fiduxevoboxuja.pdf In PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/47737411489.pdfIn PDF document text
    • http://xinyuemu.net/assets/202109/files/20210907212841637568.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/2650093856.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/83962562390.pdfIn PDF document text
    • https://alaskaproauto.net/nbloom/fckuploads/file/20720376595.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/zumejeseverugupomunafapid.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/94865526548.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/5a6258d4b375b792fd9264f2f5944b18/poxidopaz.pdfIn PDF document text
    • http://4rrecycle.com/files/file/23231871968.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/sanabotunagegijawenimag.pdfIn PDF document text
    • https://limadelimon.com/images/file/jesubiwivajuledi.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/nosegatozuji.pdfIn PDF document text
    • https://bonekarusa.com/contents/files/piratew.pdfIn PDF document text
    • https://nikunjfoundation.org/ckfinder/userfiles/files/ritojolutu.pdfIn PDF document text
    • http://sciattella.net/images/file/difudalananije.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/93338947107.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/10509775789.pdfIn PDF document text
    • http://wixoon.hu/upload/file/kaliwevarojigapedutak.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/rixawavomu.pdfIn PDF document text
    • https://nhahangphongcanh.com/uploads/files/pefekuwezepaj.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/ladamupusa.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/diniduvarojusi.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/dekinosajenudafarilewabo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=avatar+the+last+airbender+gomoviesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A7 10884 bytes
SHA-256: 959bd69adfe77a316c5d3e9ea9441169500df1c8c29600226733966fc7599a22
font_02_sfnt_off0000ec6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 20360 bytes
SHA-256: b172477926dd4dfae207948ee5dae2290c288f8a30aeec16eab16c3fa5bfdf7a