Malicious PDF — malware analysis report

Static analysis result for SHA-256 76eebce7bf535844…

MALICIOUS

PDF

79.1 KB Created: 2021-06-06 20:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 32276996a980f0e79d1452b1ed531e08 SHA-1: 23f0ca52daa57d924ffe7d248dddb09e7a2dbfdd SHA-256: 76eebce7bf5358440289669d24cf160c8088d18ab05282b7de60bb6d163733b5
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 0.9995

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://soxebez.ru/123?utm_term=critical+ops+hile+apk+ios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454438/normal_602d79469c6cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383930/normal_5fdfced9bbc32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5fd191802b412.pdfIn PDF document text
    • https://sebaderibegagib.weebly.com/uploads/1/3/4/5/134583030/1019514.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500440/normal_5feccdd778aff.pdfIn PDF document text
    • https://xajekegok.weebly.com/uploads/1/3/3/9/133997321/gezuxuxatinod-pilulogovij-fuvesozobigukaj.pdfIn PDF document text
    • https://linezajokopu.weebly.com/uploads/1/3/4/6/134629872/6c8e660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412165/normal_60410d222b9ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454184/normal_5fcf135b977aa.pdfIn PDF document text
    • https://xigowobil.weebly.com/uploads/1/3/4/6/134645495/pesedow-judofagobukinuz-fidenobotiwub.pdfIn PDF document text
    • https://suzaruluzi.weebly.com/uploads/1/3/4/4/134455671/nosumuvap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dufogeruzipu.pbworks.com/w/file/fetch/144733362/24269470243.pdfIn PDF document text
    • http://ruxafonan.pbworks.com/f/how_to_set_gardena_water_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f650982d-2ea6-4ef2-b7fc-ae72b73d4f2d/jeluwodowedanafoferisejul.pdfIn PDF document text
    • http://funinupun.pbworks.com/f/82921443094.pdfIn PDF document text
    • http://litorabi.pbworks.com/w/file/fetch/144523743/11231798821.pdfIn PDF document text
    • http://gozuwef.pbworks.com/f/61149272400.pdfIn PDF document text
    • http://kejufavo.pbworks.com/w/file/fetch/144701388/10630435680.pdfIn PDF document text
    • http://ruxafonan.pbworks.com/w/file/fetch/144727563/56915807803.pdfIn PDF document text
    • http://togusan.pbworks.com/w/file/fetch/144686127/empresas_con_departamentalizacion_por_clientes.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/w/file/fetch/144451530/biology_jamb_past_questions_and_answers_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d825757c-a364-436b-8b0e-159bcabc79ad/how_to_install_graco_snugride_car_seat_base.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE9 4988 bytes
SHA-256: c1178cf6f675e6c29ee7c473c5d9c4deda6c0186f009a060adcd994081d3e7eb
font_01_sfnt_off0000fcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD0 2536 bytes
SHA-256: 43d3dc35fac3cbb87bee9e3a39c9b3c65790059e51ddf3400f165f04894b88c5
font_02_sfnt_off000107b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B1 11428 bytes
SHA-256: 8a533aa5c3e465fe396c744eba1bd73faade91e843340e2c8760ff22a946fc4f

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