Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3f5b0b60d390e8…

MALICIOUS

PDF

82.9 KB Created: 2021-09-21 05:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 50e77e6cbe94886023cce34f828de61c SHA-1: 974726762df4ea230e1c9f36c415cedb34cf4976 SHA-256: dd3f5b0b60d390e81e358a66cf64df51979d9e811742cb8283cabe18529c63e7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to suspicious domains and are likely used to host malicious content or redirect users to phishing sites. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM suggests the PDF is part of a link farm designed for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://xn--pssa17sw71b.tw/upimages/files/puwel.pdf In PDF document text
    • https://weeb.nu/userfiles/file/zomolal.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/24044238998.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/ridopibimuboxa.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/34755358668.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/8260214565.pdfIn PDF document text
    • https://pixel.bg/img/file/9484700512.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/vagokal.pdfIn PDF document text
    • https://urology-andrology.com/userfiles/file/dunanovoxodagepel.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/fokarezorevuwunibi.pdfIn PDF document text
    • http://guitarenko.fr/img/files/kiposa.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/ximogolaribukulugajosoma.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/26592194608.pdfIn PDF document text
    • https://vantainoidia.vn/ci/userfiles/files/zukodudinefukugo.pdfIn PDF document text
    • http://groupkaishan.com/d/files/88040836488.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161310b0f9946f---kumibolufidekipubokukikuj.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/12525351198.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/dowitibagojiwibuma.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/f1913879fc7e4c1eafc94b7f675fdd5e/xevovoxikezivirume.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/32042129949.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/92497657637.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/pobekewikosefavorumo.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/95237290876.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=metodo+global+de+analisis+estructural+pdfPDF 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_off0000d9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DC 19644 bytes
SHA-256: 9e2a9dda722aec1f2d62c0fa37bc0053bf5566b8fea27af43a9a6bbaea779d29
font_01_sfnt_off00010c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4B 11028 bytes
SHA-256: 9f66810270a9205e4367ce596be89cfe8369a06a08461aa8423c96ad5cd18b60
font_02_sfnt_off000125aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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