Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bed0736ef51aff4…

MALICIOUS

PDF

143.4 KB Created: 2021-04-01 21:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b705ea3b0501dd1b6ebd386fa52123e7 SHA-1: 166c12f27b2ce6b1a5f5c3455ceda5bfbd881dfa SHA-256: 8bed0736ef51aff453e754cf9b69f642bc8738a39ea9b01cc5779f911b65f71c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://seumenha.ru/award?keyword=neoliberalismo+en+america+latina+pdf PDF link annotation
    • https://cdn.sqhk.co/jesovolavig/b0ygdib/crop_video_online_no_watermark_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/Ghhngge/yeezy_350_zebra_real_vs_fake.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/gibjcjc/1.pdfIn PDF document text
    • https://cdn.sqhk.co/jadizefon/hfCAicJ/livongo_stock_price.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_604e25a6c537c.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/5209388399.pdfIn PDF document text
    • http://zagodutaf.getenjoyment.net/megazubukodudik.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/oicXmg6/mapa_de_aracaju.pdfIn PDF document text
    • https://cdn.sqhk.co/rujopupomob/hbBSyii/global_competitiveness_report_2019_vietnam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425533/normal_604d0f7f22fd0.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/F5Z0agj/regovigugakudo.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/74473190354.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/foneniz/49544863216.pdfIn PDF document text
    • http://wisexek.epizy.com/fapuvidakuzojo.pdfIn PDF document text
    • http://lagixilutami.rf.gd/tender_quotation_format_template.pdfIn PDF document text
    • http://konoxomofejon.epizy.com/gofawefodisatolizawoje.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/best_garmin_unit_to_use_with_livescope.pdfIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/articulacion_costovertebral.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/xanathars_guide_to_everything_prodigy_feat.pdfIn PDF document text
    • http://sokekakeloji.onlinewebshop.net/tozimilukixilezolasinov.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/adaptation_movie_dual_audio.pdfIn PDF document text
    • http://melurijaniloxa.rf.gd/anandam_anandam_songs_masstamilan.pdfIn PDF document text
    • http://gofuvosopo.epizy.com/egomanaco_vi_keeland.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/callus_formation_in_plants.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D91D 5412 bytes
SHA-256: eab317b55ee19b9e82cf2a4fed288a07e628196f8569f5c979ee48cc24971616
font_01_sfnt_off0001eb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB6A 14500 bytes
SHA-256: e56318706541785a545b2ea5751b91d845bba1ec7cb4dec32e5058701f75da57
font_02_sfnt_off000218f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x218F9 16076 bytes
SHA-256: d286e8b4d1cdafc5f769987bdccf7a6368ad55d0d3b8f98fd56bc2ae223999f8