Malicious PDF — malware analysis report

Static analysis result for SHA-256 848402f302a30774…

MALICIOUS

PDF

78.1 KB Created: 2021-06-06 12:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ad1229c2b9cc0ec27a794d9807681fa4 SHA-1: b178ea8ae09f9823f9f1527ab4a19440617f55f4 SHA-256: 848402f302a307744ba35ea57ac83622a514f5ca2981d25ba9e4bedba1cedadc
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 0.9997

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://jottigo.ru/123?utm_term=bertholletia+excelsa+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375890/normal_6063633fc3a4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501998/normal_5ff958b218513.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444884/normal_5fe2684d06d2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_6061ef879babb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_602ce0e61149f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451206/normal_6009088dc3e23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455403/normal_5fe62494402a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502819/normal_5fdd3937d6e8b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a7959de-e7ce-45d7-a30c-9b7892dbbf1a/metodologia_de_la_investigacion_que_es_investigar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cdebd9b-99e9-4951-b2d2-b901172f71c7/uppababy_vista_rumble_seat_lower_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb4d023-3775-456a-bca0-6eba35ebf3fb/43260076147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d98cb0c-8f56-47e8-877b-2dc1b302b0b9/pokemon_light_platinum_ultimate_gba_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a7d4ccc-83e5-406d-897b-4d53a7406128/what_does_sequence_mean_in_math.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/w/file/fetch/144423876/slumdog_millionaire_book_macmillan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e1cfc40-a43b-4e24-917c-0785dab32093/tablas_de_amortizacion_ejemplos_matematicas_financieras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f57f00-6a08-4187-adc7-84c7fdad142c/how_to_read_bass_guitar_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82af413a-bca3-4479-b513-8e8f7e1160a4/xurodo.pdfIn PDF document text
    • http://fixunomavow.pbworks.com/w/file/fetch/144618927/bejese.pdfIn PDF document text
    • http://lokiboz.pbworks.com/f/como_hacer_un_burro_con_una_caja_de_huevo.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/how_to_add_friends_on_switch_minecraft.pdfIn PDF document text
    • http://pebokuvog.pbworks.com/w/file/fetch/144645525/telugu_new_movies_2019_free_download_jio_rockers.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_off0000f414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF414 5360 bytes
SHA-256: 4aca1ac1a49e2b636ef598e52c51da0c14bb9100e6f1d978595d825e614240d4
font_01_sfnt_off0001064d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064D 10892 bytes
SHA-256: d8fc88336c1c7569fd5cdee0f483ad27ad508ac06deba0900bac9c9788ac4440

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