Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3eaac0f9c8cd40…

MALICIOUS

PDF

93.4 KB Created: 2021-03-20 19:19:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d72bff75ec8083716725a2004c28e184 SHA-1: eea6c4e033274c8f2c3dc9a2eac76868e52ebc97 SHA-256: cf3eaac0f9c8cd409ccec0e927e03cfd9efa9839be9bf4b73267bfeb2925114f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://maypoin.ru/123?utm_term=bystander+effect+experiment+pdf PDF link annotation
    • https://gigazubexu.weebly.com/uploads/1/3/4/6/134613152/nadepom.pdfIn PDF document text
    • http://gubuxuk.scienceontheweb.net/16929341251.pdfIn PDF document text
    • https://mukiniga.weebly.com/uploads/1/3/4/3/134318698/2289678.pdfIn PDF document text
    • http://lulilafemavivog.mygamesonline.org/63657053035.pdfIn PDF document text
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/1705607.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501212/normal_5ff510fadfce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_603e87f84273a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388613/normal_5fe714213d331.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/ritetemp_thermostat_screen_not_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412568/normal_5fe16f46eaf0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485704/normal_5fec189a4be0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369632/normal_5fff306203c68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_604e2f7c37ab9.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/bonafide_student_of_institution_2020_20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jepevam.rf.gd/fts_test_date_sheet_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02dca880-6522-4a25-ac94-d0d12e858d6a/sharn_city_of_towers.pdfIn PDF document text
    • http://tesoduv.rf.gd/dogaluxera.pdfIn PDF document text
    • http://tisileluvewaxut.epizy.com/marine_corps_martial_arts_program_mcmap.pdfIn PDF document text
    • http://gufusogatodogej.rf.gd/lowulidojogefiz.pdfIn PDF document text
    • http://divamepirinati.rf.gd/cervicoaxillary_canal_is_formed_by.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0cfd3b0-adfc-46c1-8b77-fd6b45e6c93e/programa_de_estudios_2011_tercer_grado_ciencias_naturales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00a84227-36f0-4710-be63-f52994e8c855/26852815893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df5b6f9f-9e9e-4c92-8e5f-b9113be5a52e/alexandra_brass_band_amasango_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c20fe4b2-4d68-4b81-b1db-667f310de36f/xawatuzezimuzalute.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_off00012f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5C 5488 bytes
SHA-256: a46f0ef3ead1735eb349298f468c0fe5be9be06d497e81e5a7c110185b6d4298
font_01_sfnt_off0001420e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1420E 11336 bytes
SHA-256: b4f54ac9db240b737c58b54b4bad8a54d12ba89ca6a14f22cc2618485481844c

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