Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bdbba7edcd3e752…

MALICIOUS

PDF

65.8 KB Created: 2021-02-04 23:00:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e894320df70fd273410ecfa73c15483e SHA-1: 061480a7473aad30f5fc56ab0b8868b5df7a63eb SHA-256: 8bdbba7edcd3e7525a6517d851d10a360bae044cc59e6d2029e0c85a1d5ff73e
184 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
  • 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=edna+karr+football+entrance In PDF document text
    • http://prognoz-football.club/kimeliwozazin73sz.pdfIn PDF document text
    • http://oyuncuxx.com/zokobejitomujhgu8.pdfIn PDF document text
    • https://vejikawotepux.weebly.com/uploads/1/3/4/8/134887167/tivune.pdfIn PDF document text
    • http://herss.space/95176927667vl2d7.pdfIn PDF document text
    • https://buwuwewofopalun.weebly.com/uploads/1/3/4/0/134097592/bokuxig-pazogenifud.pdfIn PDF document text
    • http://bufizuz.22web.org/fojugipunexopiz.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/4722998.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/vuzufexarevima/18491262103.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/79629639106.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/aspen_free_for_windows_7.pdfIn PDF document text
    • http://zazupixuwup.rf.gd/pojedupajalowojego.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/94675440120.pdfIn PDF document text
    • http://disofebuwugojuj.epizy.com/13048056244.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/old_school_runescape_high_level_alchemy_guide.pdfIn PDF document text
    • http://golujaxi.epizy.com/current_weather_report_in_noida.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_off0000c770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC770 5000 bytes
SHA-256: 64661a81858fd389b1018abd7bcfdee909e27cb344cfd41bc6e1277c1e5fecd4
font_01_sfnt_off0000d888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD888 10016 bytes
SHA-256: 261befb99671c59cbcdcd3025f25836174c74bb190a473edeac510d953dea950