Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce13cd6b4ca43d46…

MALICIOUS

PDF

72.5 KB Created: 2021-02-27 16:00:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5b4c7e3a968aa1959a196d46f357dbe5 SHA-1: a0ede1d0c2b8155199b7637253f6aa68459b33a1 SHA-256: ce13cd6b4ca43d46630339382382c7862b581b7009a09f1ee1c44abb56c28cde
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=martin+luther+95+theses+summary In PDF document text
    • https://cdn.sqhk.co/pivugisaxap/VMtez8q/905254741.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/c7653b59a.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/3Tvjaie/hoplite_definition_short.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/tiliwibevitemaki.pdfIn PDF document text
    • https://girezerel.weebly.com/uploads/1/3/1/0/131070389/feviwasifi_dupodapexuz.pdfIn PDF document text
    • https://zatuzura.weebly.com/uploads/1/3/1/4/131453499/4ec600bbba230.pdfIn PDF document text
    • https://xuwupeloz.weebly.com/uploads/1/3/4/7/134734270/razememej_vofatiwap.pdfIn PDF document text
    • https://zinegekoxemajaj.weebly.com/uploads/1/3/4/7/134767253/zerotobojew.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/pirezizimuxizekojir.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/hajigjY/widesofabalupopexulifaw.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/buniganutizavox-sumefut.pdfIn PDF document text
    • https://rikatawifusozib.weebly.com/uploads/1/3/1/4/131409861/jovipekojodifuj-mexeginatidu-wegokefeweluko-rodokuba.pdfIn PDF document text
    • https://rixijufufapug.weebly.com/uploads/1/3/4/4/134497528/lilebovutamabafuzer.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/jazamerijekufol/lagojutaredoligamoduno.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/baidu_browser_spark_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/kopotezivuwozofukoxevik.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_off0000dee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE3 5312 bytes
SHA-256: 6af15cdd431cbfb35dd58a479b2b0dc0f7aac0f796d1979ca8dd1d65d30d372a
font_01_sfnt_off0000f0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D7 10484 bytes
SHA-256: 14cc9b4fcbeeb2bba5c32ee8172da2cceb7a20d387e25f514944ff6cc36ee0fc

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