Malicious PDF — malware analysis report

Static analysis result for SHA-256 00cb3c37c8a0e819…

MALICIOUS

PDF

85.7 KB Created: 2021-03-29 02:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d49cae739c67fe76ee97df760e8a2340 SHA-1: 1ab180edb52ca3f15b7f51600df6259ff045ac18 SHA-256: 00cb3c37c8a0e8197e39f6d486957ab480c0467deabf1f4da251880fbae7afbf
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 0.9967

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://druttle.ru/wix?keyword=ralston+valley+baseball+schedule PDF link annotation
    • http://topcreditcheck.info/how_to_become_a_vet_tech_texasah1yg.pdfIn PDF document text
    • http://fibisazorowax.mypressonline.com/bosch_maxx_4_manual.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/55197337513.pdfIn PDF document text
    • http://osmosiotzs.fun/creating_shared_value_porterq7cwn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465548/normal_600cb9fc2cb2c.pdfIn PDF document text
    • http://meroxisawifagu.mygamesonline.org/larexizulak.pdfIn PDF document text
    • http://vinograd.io/2733498719796wpe.pdfIn PDF document text
    • http://wugafis.66ghz.com/partnership_agreement_template_new_zealand.pdfIn PDF document text
    • http://zuvels.xyz/ejemplos_de_lenguaje_comun_a_lenguaje_algebraico1d8pl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fc80a717f27d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_604edd4fa81a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393776/normal_60535da0614fc.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/bhagavad_gita_nguyn_ngha.pdfIn PDF document text
    • http://bobujopolodusol.mygamesonline.org/business_english_book_free_download.pdfIn PDF document text
    • http://hookup750.website/neon_green_and_black_running_shoesq3xnc.pdfIn PDF document text
    • http://wigobike.sportsontheweb.net/xowojibijobuxenej.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/falafeg.pdfIn PDF document text
    • http://nuxipawuxodiwa.getenjoyment.net/51914199151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426974/normal_6055060b96927.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7c3a386c-9197-44ff-a2a0-26a6be1b6260.filesusr.com/ugd/bba797_1b3a411fddee4dc882c15c63547097dc.pdf?index=trueIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_b75d7aff31e043d098b9efdc5ee79627.pdf?index=trueIn PDF document text
    • https://38c64f87-0506-4925-a3a1-425743e24937.filesusr.com/ugd/386d45_a7513b4c047c42ef8cba3883477bde68.pdf?index=trueIn PDF document text
    • http://vawerudarasikow.myartsonline.com/buku_akuntansi_pemerintahan.pdfIn PDF document text
    • http://lisuxuzilim.epizy.com/rutekatixamutifowa.pdfIn PDF document text
    • http://runapapaxezupow.rf.gd/galvanized_sheet_metal_box.pdfIn PDF document text
    • https://e1cd7dcf-8988-4be8-9b1a-722367337987.filesusr.com/ugd/6203b9_b8efa18ce56744dcaf16075ca1f62417.pdf?index=trueIn PDF document text
    • http://wonenuw.epizy.com/paradi.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_off00010bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDF 5240 bytes
SHA-256: 091e1d465c8ee5a053a51d653c272e3dfeeb77cdbc3f06673a5168d07f1e3a1a
font_01_sfnt_off00011dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBF 12572 bytes
SHA-256: 279555296c3175459718ecd0d8720b799781af7bfa51c1f5c64dedf9ea23cc77

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