Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa53e49b0a8b877…

MALICIOUS

PDF

71.6 KB Created: 2021-03-02 18:06:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0be0d5d01a30f56d16d09ac3e5d705d0 SHA-1: 53c9ad122fee684b3c1013dba4529eccda33f3e8 SHA-256: 8fa53e49b0a8b877251b20fe1d7ad549813bc6f4844e8fc6d66f8ec7bfec5810
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/wix?keyword=go+math+grade+4+chapter+4+pdf PDF link annotation
    • http://fruitslope.online/what_is_the_hold_button_on_a_carrier_thermostate2bu5.pdfIn PDF document text
    • http://medicalpracticementor.com/wiring_simplified_by_h.p._richter48s25.pdfIn PDF document text
    • http://letnesil.xyz/gutoxibasakekugewirumufozc9de.pdfIn PDF document text
    • http://texitow.iblogger.org/breadman_plus_instructions.pdfIn PDF document text
    • http://janexik.22web.org/triangle_classification_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481699/normal_601ef42c6a532.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_5fdc782c3044c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368485/normal_5ff3ab10d31ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407069/normal_5feafbf4a78cd.pdfIn PDF document text
    • http://leomannapov.com/sbrs_funtua_past_questions_and_answersh5b9t.pdfIn PDF document text
    • http://euroshopmn.space/python_cheat_sheet_for_competitive_programmingpw9mq.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/74136949074y69r4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiwizenodemi.epizy.com/jeketulaweraro.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/transformer_son_garage_en_salon_de_coiffure.pdfIn PDF document text
    • http://medipebep.rf.gd/59569561246.pdfIn PDF document text
    • http://kujidoxavok.rf.gd/car_mileage_tracker_form.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_off0000dbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFB 5480 bytes
SHA-256: 40a35f9324fca2255900b8a91e525f35ab84f1041f4be58aa349996e8e5c2ad0
font_01_sfnt_off0000ee7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7D 10240 bytes
SHA-256: d3ae0f817c62f5e9a0f6fe74c89b84750e451c537cd793fc62da714b75892838