Malicious PDF — malware analysis report

Static analysis result for SHA-256 59749b60910b0e16…

MALICIOUS

PDF

166.7 KB Created: 2021-02-28 10:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: aa22246eaddabd571f080cdffc7b1b55 SHA-1: f1ee7a2678eb2e745daa722e316c82b3cfe8b55a SHA-256: 59749b60910b0e16bf98cd2add9c6481475089b68987e9601d7e2727474afad9
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/123?utm_term=bass+clarinet+orchestral+excerpts+pdf PDF link annotation
    • http://bisibometixo.mywebcommunity.org/7_times_table_chart_up_to_30.pdfIn PDF document text
    • https://riwumoba.weebly.com/uploads/1/3/5/9/135965326/venosin-dapejovebavoda-soparapigavir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455876/normal_6021cd7822318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409258/normal_5fd08ea888f84.pdfIn PDF document text
    • https://fusajebotiv.weebly.com/uploads/1/3/4/3/134320253/bazupopebajev.pdfIn PDF document text
    • https://boxemafal.weebly.com/uploads/1/3/3/9/133997404/govowujojugive.pdfIn PDF document text
    • http://rivilidopu.medianewsonline.com/tigudoxegaze.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/how_to_become_a_good_husband.pdfIn PDF document text
    • https://xuvibelatubeni.weebly.com/uploads/1/3/5/3/135306186/judulemu_dulekuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5ff0c9ed9e73d.pdfIn PDF document text
    • https://cdn.sqhk.co/sofaxuleruri/gfjh3d2/7663325997.pdfIn PDF document text
    • https://nonaparipito.weebly.com/uploads/1/3/4/2/134265999/fogali.pdfIn PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/142264.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zotubune.myartsonline.com/73025756015.pdfIn PDF document text
    • http://bolirazebaf.myartsonline.com/23990354897.pdfIn PDF document text
    • http://widifusi.myartsonline.com/how_to_install_offline_google_maps_on_iphone.pdfIn PDF document text
    • http://kadoxosin.atwebpages.com/zotidabivorib.pdfIn PDF document text
    • http://womawujun.atwebpages.com/gobulorebopazurewexe.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24F2E 5360 bytes
SHA-256: b8403e32e6cad337affb5235532b3a94f6c6df11b801a49eadf156d486ac829d
font_01_sfnt_off00026165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26165 13732 bytes
SHA-256: 3f3f342d49efea2abe84f74a326319bd8b5aad1e456d38b2a961be1104be8952

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