Malicious PDF — malware analysis report

Static analysis result for SHA-256 da716ff414928133…

MALICIOUS

PDF

69.5 KB Created: 2021-06-06 23:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b60637d5f2a2d4ff8ff6a908e8a8f7d3 SHA-1: b920ba797c3030b643f6b1ebdeace8ba4891357e SHA-256: da716ff4149281332c93495601dfc84f7b458c4989a805fab4d2f0fca22c07aa
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically flagged as an external URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://ketchas.ru/pbw?utm_term=violin+sight+reading+exercises+pdf+grade+2 PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiwuwas.pbworks.com/w/file/fetch/144683862/mise_a_jour_autoradio_android_bmw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93f5197-d07e-46e4-9612-2fff13e6376c/the_canterville_ghost_burlington_2_eso.pdfIn PDF document text
    • http://fepazonavu.pbworks.com/f/jasitebugakegadefixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24c61ef2-3e70-4bd2-adad-0f805ed6b003/lord_of_the_flies_characterization_chart_answers.pdfIn PDF document text
    • http://siwuromo.pbworks.com/f/what_is_the_definition_of_retained_earnings_on_a_balance_sheet.pdfIn PDF document text
    • http://mujusevo.pbworks.com/f/lujaku.pdfIn PDF document text
    • http://farejutotej.pbworks.com/w/file/fetch/144533697/auto_chess_mobile_pc.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/f/dilanda_download_mp3_music_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33fc1f7d-46c5-46fe-8900-6371b3593ef9/what_is_the_meaning_of_howling_mob.pdfIn PDF document text
    • http://kuperuxowix.pbworks.com/f/91343638865.pdfIn PDF document text
    • http://lokifasowaso.pbworks.com/w/file/fetch/144725583/how_does_macbeth_change_in_act_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64127ac5-ee25-47f2-b898-044005864dab/ic_756_pro_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a7af4c-861f-453b-91e7-8a82f4acf31b/silopojepafolufakoferu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b75239b-85f5-4ec5-92e3-01d177001a92/kigav.pdfIn PDF document text
    • http://gibabug.pbworks.com/w/file/fetch/144724236/14714634970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60f31c5-47c1-4365-a01d-cd3cd3d192a2/microsoft_access_2010_requires_visual_basic_for_applications_if_you_continue.pdfIn PDF document text
    • http://pinurakus.pbworks.com/f/17907530350.pdfIn PDF document text
    • http://nuxawakaxaz.pbworks.com/f/vogosazelexovofitabefexu.pdfIn PDF document text
    • http://nerobedevu.pbworks.com/f/14362895009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7248d01-aa7d-4391-af88-ba5bc4b963c8/ferrari_logo_vector_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/877e7c6e-bdef-4d88-8665-098554df89a8/lfs_xfg_araba_yamalar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc2f502-cc2e-4a2d-83fc-58221af862b2/28480373425.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_off0000d47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47A 5584 bytes
SHA-256: eb57a1c9ac944f1d976726749ed2d7c0fd99a4e285cf2338e015be3fc477d7cd
font_01_sfnt_off0000e77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77C 9748 bytes
SHA-256: d5c173a03b636b7711a1031d6c4aae277c261fd60c6ee3f9b0bac66b2920ae53