Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2b47d56c95a429…

MALICIOUS

PDF

81.7 KB Created: 2021-03-05 13:20:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d8a1528167dce97c5b18c43f7794cef2 SHA-1: 6eb8a33e755bf1853b54de64e6fd8ae8468782a9 SHA-256: 8e2b47d56c95a429e653799c2eed198be668f36a43ec1cbf0bceff517cee5b7a
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one specifically pointing to a keyword-related URL that is likely a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a malicious intent to redirect users. ClamAV detection and ML classification strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/wix?keyword=fahrenheit+451+part+2+figurative+language+worksheet+answers PDF link annotation
    • https://tigakivukabor.weebly.com/uploads/1/3/1/1/131164093/e28bddca4ad.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/6638927.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/75447155923.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/why_engine_service_soon_light_is_on.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/how_to_unlock_panasonic_air_conditioner_remote_control.pdfIn PDF document text
    • https://gejowarog.weebly.com/uploads/1/3/2/7/132740172/rimegesozopos_jopetosu_gajazosaresun.pdfIn PDF document text
    • http://votutatiturapat.22web.org/carl_sagan_contact.pdfIn PDF document text
    • https://renixopofofof.weebly.com/uploads/1/3/4/4/134486295/wotulonuminajesuba.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/futozesuremaxovekumopabo.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/vopupusovewutalefudug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://minegavanifur.rf.gd/titir.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/tempered_kushala_daora_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/746c2290-0dde-4633-8113-a514dc16e295/english_for_business_studies_teachers_book_second_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/black_wallpaper_1920x1080_for_android.pdfIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_56db5fa219b74cc6850af14568155cdb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/blackburn_college_apprenticeship_application_form.pdfIn PDF document text
    • http://letituxis.epizy.com/41093660688.pdfIn PDF document text
    • http://tafobinememen.epizy.com/assistive_touch_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/latelemamapebefatopivi.pdfIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_ed5686fdadec4730abf14cd8e6a18f3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/kajebafakusukoxebiwupazit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/662432f3-95cc-42a5-9fb8-42620331b8a5/54691609483.pdfIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_7276012d1abe488584d1e06724c203cc.pdf?index=trueIn 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_off0000ff35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF35 5728 bytes
SHA-256: 29c3c701c3c50479a1a4bc2a2c0171ce6f39bfcccee5cf9f6a55e0d7973206b7
font_01_sfnt_off000112e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E6 10556 bytes
SHA-256: 3a14ed2d6279a1a387eaf2621a04098d658dc8499336ea4a435cdb05c8497700

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