Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c67629797d3cc33…

MALICIOUS

PDF

78.6 KB Created: 2021-03-24 23:10:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 09f5f2419c674823d39d136636fe936d SHA-1: 12aff08d0b4c1dfab4af4a86c59af56e6c5dd12a SHA-256: 8c67629797d3cc330bc4ecb477122579aded7772ca2398bb75d05ec31413162b
134 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://kuzutuzo.ru/123?utm_term=rpg+maker+mv+crack+1.+6.+1 PDF link annotation
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/viziba-goledewoduv-rusizerutoxazu.pdfIn PDF document text
    • http://neo-tp.ru/your_texas_benefitshh359.pdfIn PDF document text
    • http://moneymaya.site/gakavub419ot.pdfIn PDF document text
    • http://ontrade.top/34348389876es07r.pdfIn PDF document text
    • https://nixunirebexif.weebly.com/uploads/1/3/0/7/130776125/dosafinewa_pirilejizone_zolago_xuxatogejekisuw.pdfIn PDF document text
    • http://christinaanddavid2019.com/fema_is_158_answers90xy2.pdfIn PDF document text
    • http://axecheat6.xyz/vinamprauo.pdfIn PDF document text
    • http://milansit.space/lijokifivopuzipunasinabopzhlkz.pdfIn PDF document text
    • https://vebunigujop.weebly.com/uploads/1/3/4/3/134367951/xotilafamo_vagogudogotuj_vogomokatogani_pudovo.pdfIn PDF document text
    • http://winnerslm.space/vidos_gratuites_dincest_3du7k62.pdfIn PDF document text
    • http://omerkatanalp.com/how_do_i_connect_my_hp_officejet_4500_to_my_mac9tqpx.pdfIn PDF document text
    • http://file-id.ru/58606814351w54do.pdfIn PDF document text
    • http://santaparker.store/50_essays_4th_edition_freewys6w.pdfIn PDF document text
    • http://magicwoolshop.com/2012_hyundai_sonata_tire_size_p205_65r16_glsc1rcz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/celestine_donkor_okronkronhene_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/hive_thermostat_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/sebasuporibejo.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_off0000f72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72A 5412 bytes
SHA-256: 63d688d7125d076d1451e95b857747090c3aacc2ce29615ae7c7fe7e5ea8cef5
font_01_sfnt_off0001099d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099D 10628 bytes
SHA-256: 1238cad9b192cc8d49718a32898ed5612746bdfa1ecd0304692c6021f24c284b

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