Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba305314ac388ef…

MALICIOUS

PDF

75.5 KB Created: 2021-04-05 23:23:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c304feadbe088167b1980a314a922016 SHA-1: 3f4445fa2868f5927ae41db70d5d8f8297a7e2ca SHA-256: 2ba305314ac388ef3b5e721600d9ca8ad80e70791ce9f18193c5752818930199
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=how+to+check+shear+in+slab PDF link annotation
    • https://nifevokore.weebly.com/uploads/1/3/1/4/131437532/31483.pdfIn PDF document text
    • http://tapasin.sportsontheweb.net/al_capone_does_my_shirts_novel_study.pdfIn PDF document text
    • http://nivunexodu.22web.org/22301256286.pdfIn PDF document text
    • http://sokobumoxagug.scienceontheweb.net/burnham_revolution_boiler_troubleshooting.pdfIn PDF document text
    • https://ganupedudajoz.weebly.com/uploads/1/3/4/5/134586443/mijuvomanak-xitaneban-dujifewarogof-lugikebebevipu.pdfIn PDF document text
    • https://derigogo.weebly.com/uploads/1/3/4/0/134017063/4446410.pdfIn PDF document text
    • http://viwavidif.getenjoyment.net/desix.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/17056394490.pdfIn PDF document text
    • http://mibilivo.scienceontheweb.net/74850328279.pdfIn PDF document text
    • http://wuroguredogir.getenjoyment.net/vizofupifoki.pdfIn PDF document text
    • https://felipivi.weebly.com/uploads/1/3/1/8/131856333/5293030.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/nitizobuv/26298221399.pdfIn PDF document text
    • https://beca70af-11ea-46d2-a649-d7fd44c468ee.filesusr.com/ugd/dd41e2_1acd4e1f96a44f31976ab92c6d8d5345.pdf?index=trueIn PDF document text
    • http://bafuwujix.atwebpages.com/mulolidevapaf.pdfIn PDF document text
    • http://larovitivejel.atwebpages.com/autocad_2d_and_3d_tutorial_free_download.pdfIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_2264e5ae44d6446c8d895727fcd05109.pdf?index=trueIn PDF document text
    • http://xekokopadupino.rf.gd/tratamiento_de_angina_de_pecho.pdfIn PDF document text
    • http://mafekebokidodat.rf.gd/english_grammar_basic_book.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/jixavododekudirowopijiji.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/januluguwufamovupir.pdfIn PDF document text
    • http://wusujiko.rf.gd/jspdf_autotable_font_style.pdfIn PDF document text
    • http://bosagiriwamokin.onlinewebshop.net/bipavunudogarafuza.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DD 5144 bytes
SHA-256: 928f77bf919149ae5d3d5a32331775a232022e1f985ad2a057b3d7238641fa56
font_01_sfnt_off0000f966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF966 11080 bytes
SHA-256: c8a380d2f0310714a78902940e5838d2b25970a7c78a064039075edfe7c7bea1

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