Malicious PDF — malware analysis report

Static analysis result for SHA-256 310f81142ad90121…

MALICIOUS

PDF

65.6 KB Created: 2021-02-28 08:01:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 74dec217d9e1a3661a9f0a5d043e5796 SHA-1: 72d7083f9b0ac3d613bd8042d9f612e603fb9515 SHA-256: 310f81142ad90121a6c4be5988a7d077fa3d6b1808077a4b7dfac31d202be324
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://leonvi.ru/wix?keyword=inferring+character+traits+worksheets+for+grade+2 PDF link annotation
    • https://kekulepolunan.weebly.com/uploads/1/3/4/8/134889268/5472877.pdfIn PDF document text
    • https://sizadefo.weebly.com/uploads/1/3/4/3/134381744/pamebogapumif-botalaluvirogeg.pdfIn PDF document text
    • http://gomotejux.iblogger.org/73439071472.pdfIn PDF document text
    • http://talezoruvaje.iblogger.org/23283759745.pdfIn PDF document text
    • https://rabuwamefikulo.weebly.com/uploads/1/3/1/3/131398373/wekopu.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/6jhz15F/81029071193.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/yScigQm/84290065690.pdfIn PDF document text
    • https://nenubijul.weebly.com/uploads/1/3/5/3/135393623/7931650.pdfIn PDF document text
    • http://dixuvexawob.22web.org/35795277416.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baletax.onlinewebshop.net/army_supply_nco_board_questions.pdfIn PDF document text
    • http://nosenek.epizy.com/religious_education_lesson_plan_template.pdfIn PDF document text
    • http://pulijivugis.epizy.com/likonum.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_off0000c423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC423 5476 bytes
SHA-256: c45902cbfb530a1a3024934efbb09371c3ad352ede70d7f157fa0eeee0aa16c0
font_01_sfnt_off0000d6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DB 10104 bytes
SHA-256: ddb116eb426a470a0f1cad40922fe1a1bf67503970b7d515ef3190ff198e1dad