Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df3606a2dabd921…

MALICIOUS

PDF

76.2 KB Created: 2021-03-16 15:12:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f922aad7459edf6faa101824e5951d50 SHA-1: a9fb77ee9ba0283e971b2163d0e1dc9cd3009927 SHA-256: 2df3606a2dabd921a4a8960f79354702d03b322da0dbe1037fd59f48f3f74cd1
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/award?keyword=earthquake+seismic+waves+pdf PDF link annotation
    • http://erogancolumbia.site/72930545130qo013.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/marlin_336_serial_number_starting_with_mr.pdfIn PDF document text
    • https://lanuwoga.weebly.com/uploads/1/3/1/6/131637333/mawex_sosawenoguma_xuvet.pdfIn PDF document text
    • http://nyvelsets.online/tipiwexevewmwq11.pdfIn PDF document text
    • http://sokfresh.fun/21493022530ykgij.pdfIn PDF document text
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/d27b6fbc866.pdfIn PDF document text
    • http://fumexijana.getenjoyment.net/80475811226.pdfIn PDF document text
    • http://lidzadva.xyz/8484338557ohlp7.pdfIn PDF document text
    • https://mokugutareno.weebly.com/uploads/1/3/1/6/131606089/bupekekive.pdfIn PDF document text
    • https://dumisoxi.weebly.com/uploads/1/3/4/6/134625223/3c5e7c74.pdfIn PDF document text
    • http://datingsexchat.site/vomaxufafavakunakusuw51ss9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sikuva/blackboard_app_for_android.pdfIn PDF document text
    • http://kebanibaru.epizy.com/19312093487.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_62583512d8dd4bbfb206fc9072635931.pdf?index=trueIn PDF document text
    • http://xuxivobanirug.epizy.com/anime_movil_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/cisco_2960x_stack_configuration_guide.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_9c4cf5f32ea04c1384fa8e12f77d2d2a.pdf?index=trueIn PDF document text
    • http://nerokezixuzat.epizy.com/net_framework_4_filehippo.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/senozom.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_off0000ed6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6F 5660 bytes
SHA-256: 34df8e8434ab923df1974e3c3ac162428d73327396e2838f1fcacd510f3cb6ed
font_01_sfnt_off000100a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A3 10760 bytes
SHA-256: 0533ab12dd6b4cc506d78df370ecdc59c70df24a4864b834be79dbcd260688de

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