Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1c586ebb3f0f2f…

MALICIOUS

PDF

76.8 KB Created: 2021-04-23 05:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 45752a1e81f9a9d4acba4cc95bfc2785 SHA-1: 5cf081414af29a8e9a7abd92b36da3a7ee218d93 SHA-256: 7e1c586ebb3f0f2fc5b6419f5e0ed5f57b66f8d248a601e1dc907b96288ba66a
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 0.9999

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://vilenefex.ru/strik?utm_term=inteligencias+m%25C3%25BAltiples+pdf PDF link annotation
    • http://rumigiwataj.getenjoyment.net/nevralgie_cervico_brachiale_symptomes.pdfIn PDF document text
    • http://reestr.site/gamutagorufowuzifizuvvdm7a.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/subject_and_predicate_worksheets_5th_grade_with_answers.pdfIn PDF document text
    • http://edevletorg.com/how_to_clean_black_and_decker_drip_coffee_maker30gqp.pdfIn PDF document text
    • http://stroiline74.ru/834948015128aq94.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/stihl_ms180c_chainsaw_manual.pdfIn PDF document text
    • http://eurozone.pro/how_long_cook_roast_in_crockpot_on_highkiq82.pdfIn PDF document text
    • http://strongcreditscore.info/mazanemifimiwiktxmj9.pdfIn PDF document text
    • http://warajuvevuv.medianewsonline.com/43604922892.pdfIn PDF document text
    • http://zoosalon.org/puzafero7mz5r.pdfIn PDF document text
    • http://dronextactical.xyz/lowrance_elite_7_hdi_prezzo3spjw.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/cea7a90d-e009-4368-bc23-57c6f31de4fa/53_bank_ppp_application.pdfIn PDF document text
    • http://xakazasaravi.onlinewebshop.net/propiedades_fisicas_y_quimicas_de_los_alcanos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a1a31cc-b993-4bd7-9864-6e427d067689/furagawowosadudaxapipegu.pdfIn PDF document text
    • https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_588a24ce72804cfea2b6da766105a66a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zopenave/intermec_pm4i_label_not_found.pdfIn PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_26906e2e6ac6482ba7070ba610c82816.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/bejefebudekofafitutilid.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_off0000ed68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED68 5432 bytes
SHA-256: e5bb760bb6ae98aa36fb4a23baeff0d207fb8c83dcd9c02ce9b0624121341182
font_01_sfnt_off0000ffa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA8 10840 bytes
SHA-256: f4fa4d1a6909808ac962afa74c562fa569f4ebe1ed295a5de8b6d62ea110971e

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