Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f9b34fed6522ee…

MALICIOUS

PDF

70.6 KB Created: 2021-10-03 18:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 876552d8c299f4ecaa58238c9f5fd76d SHA-1: ff112eee51ac218fa9ebc486b245948553936028 SHA-256: 80f9b34fed6522ee1d711996bfb51047108c69f7328c024d5ea64f86f6ce514a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=international+day+against+racism PDF link annotation
    • https://whitesal.com/data/images/file/7565_20210905151601.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49505093589.pdfIn PDF document text
    • http://adice-area.com/pictures/files/36630954065.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/95040351420.pdfIn PDF document text
    • https://awinresource.com/uploadfile/file/58541747274.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/30349675017.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/757166660.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/falarinu.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/giberewezezapunogageki.pdfIn PDF document text
    • https://citytrafik.nu/images/file/munidaw.pdfIn PDF document text
    • http://soles2walk.com/data/file/wezufarisalemevemadoweb.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/deziko.pdfIn PDF document text
    • http://graczeonline.pl/userfiles/file/kuxilin.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/80662811757.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/83357665008.pdfIn PDF document text
    • http://hansungid.com/userfiles/file/lawufoguwawevodej.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/38939586661.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/0e6e3n2ocqi2tar2h3k22enbc9/gadimujor.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16143af046d093---pefoj.pdfIn PDF document text
    • http://antitumor.org/filespath/files/20210902144834.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/76882631293.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/16453521168.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_off0000b129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB129 16728 bytes
SHA-256: 4eeb083afa0e7b1af614ef112a61b9801af9bdf60d3ce050b173c0eb2a0bf177
font_01_sfnt_off0000dbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDD 10776 bytes
SHA-256: 0e2347a212298fce619b7f7c782266482bcc587a56bf6f7aa02ecf3d4fa8c653
font_02_sfnt_off0000f476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF476 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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