Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae4299d2ea516a7…

MALICIOUS

PDF

83.0 KB Created: 2021-09-18 09:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cc6fed53a8a40e9d4d778d3f2c301890 SHA-1: 6b0a9e933490c7face599e1c8a14dd56f940c922 SHA-256: 3ae4299d2ea516a742b63723dd0dacf4e4e2b93756b6fe89fe7d6725144dc8ea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, with one specifically disguised as a 'video converter pro apk' download, suggesting a phishing or malware distribution lure. The presence of many distinct hosts and links points to a link farm used to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://chcial.ru/uplcv?utm_term=video+converter+pro+apk PDF link annotation
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/0617c065afd629de8c854c6332dd4937/2753763190.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/bidiziwupol.pdfIn PDF document text
    • http://ukrfirework.com/images/file/61866364406.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/25592480040.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/29198699284.pdfIn PDF document text
    • https://insinkerator.us/images/uploaded/file/24626416753.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/12648319934.pdfIn PDF document text
    • http://fitviewer.biz/files/file/niwuzuwifibi.pdfIn PDF document text
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/75612503958.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/48751433085.pdfIn PDF document text
    • https://paulogomeslda.com/userfiles/file/64740769215.pdfIn PDF document text
    • http://groupelamiri.com/uploads/FCK_files/file/22469961950.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/d6432abdfcd818f8ce8e56145adc0e85/96054530319.pdfIn PDF document text
    • https://brakos.it/file/86653944590.pdfIn PDF document text
    • http://www.kymenhome-etsinta.net/tiedostot/files/bopananunidegamumar.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210901100540.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/85873073886.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/fanasululavime.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/wizoxipazeg.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/womovenujunuwifelufi.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/66087786353.pdfIn PDF document text
    • http://aptwash.com/userData/ebizro_board/file/forisevuripibokakeso.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE4 18768 bytes
SHA-256: f7e3f0aba434c6dc98dbdbdc98456d2cc420116095a02d956c0971a804e3226d
font_01_sfnt_off00010eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAA 10420 bytes
SHA-256: dd1c93c5ac616e75cd7a8b5a7eb7ada91182c5e0d73e0986c9b5e50bc5ab1abb
font_02_sfnt_off00012664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12664 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.