Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6175a970624b57d…

MALICIOUS

PDF

71.3 KB Created: 2021-02-16 10:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7328da6d03855a7ffa679ebb1a57b30e SHA-1: e5cab3387b08a494882e0721958853ef0686a599 SHA-256: d6175a970624b57d4bd564e95074804bbd6cbe01a53fbf8ee7a949da165af1bd
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=how+to+install+oracal+651+vinyl In PDF document text
    • https://buwavazazaradig.weebly.com/uploads/1/3/3/9/133999961/votezurogubipej-rivixavenilub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427498/normal_5fd656911d722.pdfIn PDF document text
    • https://pinobuni.weebly.com/uploads/1/3/0/9/130969003/6531208.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_5fce69bfa7ca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491164/normal_6021c62e76bd8.pdfIn PDF document text
    • https://zemabata.weebly.com/uploads/1/3/4/6/134677216/986b5d4e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gatakokuto.rf.gd/89856966077.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/best_answers_for_common_job_interview_questions.pdfIn PDF document text
    • http://ravuxisopol.rf.gd/veritas_saw_file_guide.pdfIn PDF document text
    • http://sisuvoxodukon.epizy.com/motetiruxexepaser.pdfIn PDF document text
    • http://diwomikutaz.epizy.com/dbt_worksheets_for_anger.pdfIn PDF document text
    • http://nolewepanuvaxup.epizy.com/cornfield_chase_piano_sheet_music.pdfIn PDF document text
    • http://vurasoda.rf.gd/56781873778.pdfIn PDF document text
    • http://jadaxanesutav.epizy.com/risk_heat_map_template_excel.pdfIn PDF document text
    • http://finubovuputok.epizy.com/bwv_974.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_off0000da1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1A 5336 bytes
SHA-256: 0a458f73ca2bc4721c8908b1a1fda635b09fdd1c48df7f129f4f22c594c1ceae
font_01_sfnt_off0000ec73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC73 10504 bytes
SHA-256: 03746bdf9e3d4b08c7a8af832e1424437a4bb0f1a9303de0387dd4fb2988fbb6