Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbfb6548857bfd96…

MALICIOUS

PDF

71.6 KB Created: 2021-09-17 02:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bef18957ff53aa0428e2285c0ae6aa77 SHA-1: ead4f90512997a60845272901a8a6b9a34e15fa4 SHA-256: fbfb6548857bfd96a552a88006618380f1f6bf29c687d2981cdc75fd9fa4b738
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://crysiq.ru/uplcv?utm_term=kadaikutty+singam+tamil+movie+download PDF link annotation
    • http://parquet-cortes.fr/data/Files/dobexazox.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/madumejejodelurev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614386af258bb---vumozes.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/kanujoxajapigezok.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/99333841895.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109151646595428.pdfIn PDF document text
    • http://labuchedeberce.fr/userfiles/file/66118148473.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/kafukeponepali.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/56640475247.pdfIn PDF document text
    • http://studiotecnicodambra.eu/userfiles/files/lavuzidobiw.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/botapufoxirinulutar.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/41427449717.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/27493667317.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/61285402568.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/a28e9fe07c43b4b70d4b8d655fdfc71f/nalumadewumuxivetozozule.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/77817287201.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/97391560932.pdfIn PDF document text
    • https://ascii.tn/web/cgi/file/metowajo.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/vufutizitiloruka.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/vajonipevixopomodusikiku.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/mipexepod.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AF 10940 bytes
SHA-256: ce901a57631489cc1f8abfce7c8acfe7222b1f27e4e593f5b80c868c9fae965c
font_01_sfnt_off0000cde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE0 17068 bytes
SHA-256: 1bf32b65d3105df9ce1c6afc7dda4748935ce39675b37e0a8402ce81cb676d94
font_02_sfnt_off0000f94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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