Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d7d9c5dafa7a0f…

MALICIOUS

PDF

75.7 KB Created: 2021-06-02 15:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 811d6713c964cb993686bcffc3323cb7 SHA-1: 69c2a6d908edcc0a6e16f2d8c3588372b52e6d1d SHA-256: 68d7d9c5dafa7a0f34f380a158b64c635dd52d98b86f4d0ce1398c94d9928a7e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to link farms and disposable hosting, 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 lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://catamma.ru/pbw?utm_term=body+dysmorphic+disorder+treatment+centers PDF link annotation
    • https://metufudosajaf.weebly.com/uploads/1/3/4/0/134012305/2d4669919bcce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462037/normal_6000ea694145e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487186/normal_602d96ce36cca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453342/normal_5ff2db751aa66.pdfIn PDF document text
    • https://derunemutojo.weebly.com/uploads/1/3/7/5/137517297/bamokifarepax_dawukosom_mixisusovodunam_ribidifef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382960/normal_604386fcd5304.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456372/normal_5fc88a8f7bcab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5fd9d70da6f9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_6041dba04cf97.pdfIn PDF document text
    • https://bamopinusomuna.weebly.com/uploads/1/3/1/3/131379567/wegopemirom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_604cb9a0dd50c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siseraxoru.pbworks.com/w/file/fetch/144484119/aspergers_spectrum_disorder_checklist.pdfIn PDF document text
    • http://tagexoba.pbworks.com/w/file/fetch/144423246/how_to_use_excel_for_daily_expenses.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/f/telescopio_konustart_900_manual.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/f/27439970425.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/w/file/fetch/144424998/iso_interested_parties_template.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144414642/nikebidigajodunemojune.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/w/file/fetch/144432612/avro_bangla_typing_software_free_download.pdfIn PDF document text
    • http://vifogajo.pbworks.com/f/sun_tv_nandini_serial_title_song_mp3_download.pdfIn PDF document text
    • http://wotasaful.pbworks.com/w/file/fetch/144455436/xijodorepifo.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/f/what_are_catatonic_symptoms.pdfIn PDF document text
    • http://mumubib.pbworks.com/f/secondary_1_conditional_statements_worksheet_answer_key.pdfIn PDF document text
    • http://veniwusuj.pbworks.com/f/guzavolawagekorasototij.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/w/file/fetch/144495450/major_depressive_disorder.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_off0000e875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE875 5432 bytes
SHA-256: 4d0eaf2e2430139d356afad9ccd450ee11ac7ae03cee80565cf869376f82b99c
font_01_sfnt_off0000facc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACC 10684 bytes
SHA-256: 7ea134ebdb69e1c713fc1aa838988fcbb63cdcaff25800ba9b323d3ae49d48a5

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