Malicious PDF — malware analysis report

Static analysis result for SHA-256 a441e74d9ba03862…

MALICIOUS

PDF

96.7 KB Created: 2021-03-10 14:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a9e11c7d89602f9c62a846575e278098 SHA-1: 3ee908d1efd78a671b284a775b42e4ec0ba26031 SHA-256: a441e74d9ba03862e30d3be55cbb4fa2de791d99b51e8f0fef0783050baf4747
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with the primary URL being a phishing-related domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://lozipotod.ru/strik?utm_term=how+much+did+the+cast+make+from+harry+potter PDF link annotation
    • https://cdn.sqhk.co/zukuxenopo/hihhDrr/best_laptop_deals_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/dhhPreb/12917234874.pdfIn PDF document text
    • https://cdn.sqhk.co/tijovomiv/jajgfgd/zewigudasemeg.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/lDifiAp/i_gladiatori_inverigo.pdfIn PDF document text
    • http://suwadebizon.mywebcommunity.org/rugiwoso.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/hjcI0jh/world_war_2_timeline_worksheet_answer_key.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/0d0e33b3-be92-42c3-a838-5f0c0ef22d13/rowenta_performance_iron_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/how_to_fill_out_a_basic_rental_agreement_or_residential_lease.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/93017912353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85549229-132a-48bf-afc0-92dd521ec43d/vector_physics_problems_and_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/41779011912.pdfIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_c77c665a42a94ab69a4be0343682c517.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/burenalodefiturezabe.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/samsung_bd-j5100_firmware_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28e94fd-887c-42f8-90bd-4b76d277d5d0/jafeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17de7395-9be1-4e1d-8ca2-d1648c80857a/votuzolilupo.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/how_many_quarts_of_oil_does_a_2002_dodge_dakota_4.7_take.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/nespresso_vertuo_pods_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/tipos_de_anestesia_local.pdfIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_5a16e85023914d49ba2b896c3f8185cb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/worksheet_excel_online.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_off00013b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B94 5584 bytes
SHA-256: 071542d9e4af8ffe6fb67eb92e6cc317e6c8731e9b9a4dd334c81481096acd18
font_01_sfnt_off00014e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E7A 11392 bytes
SHA-256: c2251dcd408bcd9e4fad093ac168deecbd5552aa98f757b17608c8342990c863

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