Malicious PDF — malware analysis report

Static analysis result for SHA-256 6205a6ab8b2ef7c5…

MALICIOUS

PDF

92.3 KB Created: 2021-09-13 04:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 917e3178e28a5341a846a0c3727d0d91 SHA-1: e86a77b4749543794f0c2dabb950522782f96161 SHA-256: 6205a6ab8b2ef7c5bc3784039ad0d29a27a0271d7b74e402a894aaf1529dc5a1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The sample also exhibits characteristics of a link farm, with numerous external URIs pointing to potentially malicious or phishing sites. ClamAV and ML classifiers strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tiquital.com/documentos/file/gitep.pdf In PDF document text
    • http://marjoleintje.nl/include/userfiles/xemopalagalutipaxobife.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/vurorovixosegoxogobegenam.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/mubabapofatuxog.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/58209281007.pdfIn PDF document text
    • https://cyc-catering.pe/disac/userfiles/file/fubapijox.pdfIn PDF document text
    • http://aj-freight.com/ckfinder/userfiles/files/tazuxafakozu.pdfIn PDF document text
    • http://talentfuturesservices.com/sharpinstitute/images/files/82762584492.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/85060472644.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/fugowijuva.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130c136190ca---71797704399.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/vawupisazukixikibo.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/mixotesiwomiziba.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/xiwirifida.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/92195822937.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/7e8eadb18e5327c310f610641a0bdc15/baxusogi.pdfIn PDF document text
    • https://arendic.cl/files/24014687517.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/lumin.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/2578921128.pdfIn PDF document text
    • https://highrise.pl/file/40959145582.pdfIn PDF document text
    • http://khacvietlaser.vn/public/images_news/files/melitilurizobepakekutopow.pdfIn PDF document text
    • http://yingtailong.com/upload/file/210912062328018595595fob08covw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=record+it+for+androidPDF 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_off00010390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10390 18600 bytes
SHA-256: 0ea45351d08fdf2d2a708694ca96b1716ae172f3ad8f2261e7a4eff09f165d97
font_01_sfnt_off00013420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13420 10300 bytes
SHA-256: a7569f324f9f722b627ee2833a0a4fd4c75d23f7d803936ae9ab9d963c0e60d6
font_02_sfnt_off00014b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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