Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea2f57284d4df6e…

MALICIOUS

PDF

106.2 KB Created: 2021-03-10 05:56:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 7f95fcada6c0aaab2f6ffbbf7697baf6 SHA-1: e67e56994eaea5ad3514bec810a793bfc3c18758 SHA-256: 8ea2f57284d4df6e8c0bcadcdcd35970cc48d435bce220ec377b262f911d3cfe
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://dugedepap.ru/award?keyword=on+the+historicity+of+jesus+carrier+pdf PDF link annotation
    • http://jobauthor.online/87591500799nv847.pdfIn PDF document text
    • http://cashfree.store/domafategosomosemeb516h0.pdfIn PDF document text
    • http://eliyalte.com/fourth_definition_of_acute_myocardial_infarction2l41d.pdfIn PDF document text
    • http://converstarget.ru/46843222959uvfb9.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/cwrajaf/fiveji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368997/normal_5fc7716133073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444866/normal_6022139a0b28a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382966/normal_5fe4856bc1415.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/GjfjeO5/photo_studio_furniture_props.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403687/normal_603e76a794522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421042/normal_5fd81ebf5d683.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/hiidyGC/jugewunofegebewidob.pdfIn PDF document text
    • http://lejebodaz.22web.org/bol_tere_mithe_mithe_tinyjuke.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/jvieVS9/wadumupetimukawemo.pdfIn PDF document text
    • http://kismykeitio.best/textbook_of_family_medicine_free_download29wph.pdfIn PDF document text
    • http://enots.space/apartment_rental_forms_californiar77w3.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/bgjgfhf/xegokuzidorif.pdfIn PDF document text
    • http://esclub.pro/vijayawada_durgamma_songs_freeb0xzw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gixopiv.onlinewebshop.net/91932729648.pdfIn PDF document text
    • http://wokoguzesel.rf.gd/bhangra_dance_video_songs_2016.pdfIn PDF document text
    • http://bepolujogox.atwebpages.com/merovevipolaro.pdfIn PDF document text
    • http://dexadusoxeb.atwebpages.com/fedex_drop_off_locations_downtown_los_angeles.pdfIn PDF document text
    • http://relivoziz.atwebpages.com/diesel_electronic_fuel_injection_system.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_off000163f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163F4 5416 bytes
SHA-256: ce89d80e7de2590eb9c395c451b11725f8176730aed8f3d6396a5dd6b51b0dd1
font_01_sfnt_off0001766a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1766A 10740 bytes
SHA-256: 6aed6d51f115946ff90b5fbedfbfbe432a6ee7e57fd7c3a96ffff761225ca1ab

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