Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e77104a8578683…

MALICIOUS

PDF

78.6 KB Created: 2021-03-09 05:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d8cd9841a47dba98023d83ec5b457d66 SHA-1: bdddddde7fac0d6e0056d57d9af231dc94a1de5b SHA-256: c4e77104a8578683ee4be17198010a543a305fe457bdc234a41caa0f5b5a8390
134 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with a high concentration on disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a download button heuristic further supports the idea that the document is designed to trick the user into downloading a malicious file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=laurel+taxi+service+laurel+md PDF link annotation
    • http://tezoxefakalexo.sportsontheweb.net/banelaniridubudivokin.pdfIn PDF document text
    • http://fewutame.getenjoyment.net/44840678779.pdfIn PDF document text
    • http://botumizesakukij.iblogger.org/metal_gear_rising_revengeance_trainer_pc.pdfIn PDF document text
    • http://wofeboz.66ghz.com/smoant_charon_mini_update.pdfIn PDF document text
    • http://ziwewixowele.sportsontheweb.net/38076518583.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/blackdecker_rcs614_rice_cooker_14-cup_with_saute_function_white.pdfIn PDF document text
    • http://lopozodedawap.22web.org/jenolan_caves_fact_sheet.pdfIn PDF document text
    • http://daxavepevepa.mypressonline.com/shogun_2_christianity_benefits.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/zelda_ocarina_of_time_music_piano.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/66391674522.pdfIn PDF document text
    • http://xigosilefonaboj.iblogger.org/how_to_charge_lithium_ion_battery_properly.pdfIn PDF document text
    • http://xiselegudiwip.iblogger.org/bupexozozew.pdfIn PDF document text
    • http://sibixujuw.22web.org/car_loan_amortization_calculator_excel_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_9a433d42015c49569fc999559419c046.pdf?index=trueIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_7caf1873112046f7938786d440bbc9cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00817c5c-372c-4f0d-ac22-f5b2279b0346/46241309393.pdfIn PDF document text
    • http://gixopiv.onlinewebshop.net/how_to_use_the_bowflex_blaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37505d24-1be8-4d41-ab2e-7fcacb0c1af9/gonotadezigifatu.pdfIn PDF document text
    • http://fonunegemo.epizy.com/daletozebukiranexako.pdfIn PDF document text
    • http://kafarizoxaso.rf.gd/40963913538.pdfIn PDF document text
    • http://jakukimokop.rf.gd/primeros_auxilios_ingles_traduccion.pdfIn PDF document text
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_1d1e8e4f1e31433cae7b6982a38510b4.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_off0000f657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF657 5152 bytes
SHA-256: 9d519405f1a0b9ac8b0676b6413ff1dc0ab3be2b0785cbf0b0079124a05f9799
font_01_sfnt_off000107d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D2 10952 bytes
SHA-256: 3042abf097924d0c3e01e82b4a61744ade8ef53b4532c662ba003d740dbc29f4

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