Malicious PDF — malware analysis report

Static analysis result for SHA-256 71098ea792775b0f…

MALICIOUS

PDF

82.3 KB Created: 2021-02-24 09:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03bfc34755c886739e3b822f197a1d97 SHA-1: cb601d20b5845562ed1cf2d5339a8e8d4839f8dc SHA-256: 71098ea792775b0f30a4b2ab16088d68e80fad1f0d71e115dfe9c3ed0241aad6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://leonvi.ru/wb?keyword=how%20to%20use%20lg%20inverter%20direct%20drive%20washing%20machine PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460686/normal_6003fc9684920.pdfIn PDF document text
    • https://cdn.sqhk.co/zeboxuze/AHIujju/xetelamanutevekuko.pdfIn PDF document text
    • https://fonuwinozizanam.weebly.com/uploads/1/3/1/4/131408397/fibasinipiz_zuvijaputulad_gupizozubuz.pdfIn PDF document text
    • https://cdn.sqhk.co/detazido/gcKhbji/takudutokugafajutubixuv.pdfIn PDF document text
    • https://cdn.sqhk.co/gapobuzijiru/hbcgda0/guide_sky_glider_3d_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/hQhbiqU/twitter_video_downloader_apk.pdfIn PDF document text
    • https://giravegide.weebly.com/uploads/1/3/2/6/132681237/50117e.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/funasadane-lopizopobirebe-vimibafeni-tukivotila.pdfIn PDF document text
    • https://pabarasoziraw.weebly.com/uploads/1/3/5/3/135324669/tisima_rorami_kaletomevadum.pdfIn PDF document text
    • https://cdn.sqhk.co/bomikiwolug/ggVfhe2/80s_music_bands_list.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/jidosatikim/kitchen_inventory_list_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/carers_payment_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/faremuzujebepi.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/stomatitis_aftosa_rekuren_minor.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/monthly_chore_schedule_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/16396497816.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/best_android_games_with_controller_support_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/vexotepakizezel.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/ust_medical_certificate_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/genuvexepoxapujubuw.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/paziruzubofefilegetakip.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/alphabet_practice_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/xabokedopewajejepubu.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_off000105f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F4 5464 bytes
SHA-256: b8e4d4fdee4a4329935dc3eecf353c737c7dec612e62191f7df9ae68cce0ebb0
font_01_sfnt_off00011877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11877 10240 bytes
SHA-256: 832d8e6a1fe07a4eb9674a4e20c7c2001988ca298ba9975753df0a6698bc326d

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