Malicious PDF — malware analysis report

Static analysis result for SHA-256 304d35a3c37eb151…

MALICIOUS

PDF

77.6 KB Created: 2021-06-04 05:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2af29157c3167b568bc0f708af9371db SHA-1: 51a8489ffa37b34eef7d6cda7887a2b92cc7940f SHA-256: 304d35a3c37eb15100d2bfd0b8a2856573ae7ec632dd0da9e3e29b34ffd54067
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://philabc.ru/pbw?utm_term=livro+de+receitas+moulinex+cuisine+companion+pdf PDF link annotation
    • https://gonuzefokuko.weebly.com/uploads/1/3/4/1/134109069/kederapuwi-tofoveli-pokawak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387698/normal_5fea2aeae2a6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421477/normal_60321edeeb9ef.pdfIn PDF document text
    • https://lepekogiba.weebly.com/uploads/1/3/1/6/131637498/fivevetetak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_5fe6dcdd04603.pdfIn PDF document text
    • https://vatipasa.weebly.com/uploads/1/3/0/7/130775610/jexumarotesanex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wiwedano.pbworks.com/f/98938601343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9404dd76-628a-4d2f-89da-555475b01857/daisy_powerline_model_1200_co2_bb_pistol_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf9912a-70ec-4892-9c0e-192d98d26d77/kejep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b248ef-41ba-4a00-bee8-48a1f0b46493/which_olympus_lenses_are_compatible_with_focus_stacking.pdfIn PDF document text
    • http://memofemovo.pbworks.com/f/18502635231.pdfIn PDF document text
    • http://kakewizajupe.pbworks.com/f/tp_link_wr841n_default_password.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/w/file/fetch/144441099/37933788997.pdfIn PDF document text
    • http://lexibitite.pbworks.com/f/how_much_is_paige_worth.pdfIn PDF document text
    • http://funesut.pbworks.com/w/file/fetch/144559437/gta_san_andreas_ultimate_download_link.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0721d175-b884-4677-859a-b6d9162a0dec/what_is_project_scope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d30191-ffa5-4ea3-8133-1f0ce4e5a9d3/whirlpool_cabrio_washer_reset_no_dial.pdfIn PDF document text
    • http://dawijunegolo.pbworks.com/w/file/fetch/144576930/23598601832.pdfIn PDF document text
    • http://marutipug.pbworks.com/f/bokemana.pdfIn PDF document text
    • http://kivotin.pbworks.com/w/file/fetch/144548868/anghami_hack_apk.pdfIn PDF document text
    • http://laxaxufudej.pbworks.com/w/file/fetch/144526521/bianca_nieves_y_los_7_toritos_chapter_3.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_off0000ebfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 5368 bytes
SHA-256: 70451cde2f75d2563fd0ff3a871591dd71eea67e835b376b4301dabee7a1dcc5
font_01_sfnt_off0000fe34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE34 13048 bytes
SHA-256: 3e6becef327a3ecae4ada5235501279b22904c4416cb9fdcc4ce9b67ed4459be

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