Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0076241bfd104af…

MALICIOUS

PDF

72.9 KB Created: 2021-09-26 20:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9113c94ecf9e80287748d3a8d294b68a SHA-1: e8f452c60adcfed6e745517489cc110fcfa3abe4 SHA-256: b0076241bfd104af5dbc31fae966e83a9677635f192d0ac08d48a5b6d1dae5e7
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. Several heuristics indicate the PDF is part of a link farm hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://alutat.com/data/file/zopuxunabenamaxawanesidu.pdf In PDF document text
    • http://kargo-box.com/uploads/files/81055329938.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/xodoluwavikobinalavijak.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/54160824890.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/vevunimamupupa.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/1778066399.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/geniletexadiratono.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/jevejufixosetizenuxizulo.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614137c52ba0f---278972539.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/xoloboliwidoxemo.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/nokurigotabe.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/76267565592.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/lizelolipobiwimuninalevad.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/dumubekamegitofilerunu.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/zukujademorife.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614dd727811ca---65645451577.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/80932555806.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/wogusibadurekodotonubin.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/31e6cb59ac7b032a59fd3a2e1942a534/fodezawuxasof.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/noniwaxe.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16130df0112f26---metiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=beam+over+column+moment+connectionPDF 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_off0000b4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F9 19500 bytes
SHA-256: a3e9ac3910d4f8743656a1890552f173f92b84dac967a5ea0a781e18074a9626
font_01_sfnt_off0000e6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BC 10440 bytes
SHA-256: 45201a7303e913bfbe24a8e42beacf84627d0ea8d56648b9d2660f8cde7b0ee1
font_02_sfnt_off0000fe6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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