Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca8b490aa5f9c9fc…

MALICIOUS

PDF

67.6 KB Created: 2021-03-22 06:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c62907d5e6d4400cc175eb3413e629bd SHA-1: d373f9ebff114e13bc03c7ab0d3ecd90e811d57c SHA-256: ca8b490aa5f9c9fcff3178dae1040ce5a5bfa52f9277f8786d4451aced22ac41
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://mezovuduw.ru/wix?keyword=yusuke+nakamura+special+set+of+12 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417306/normal_60436d2c00eb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411916/normal_60011f6882694.pdfIn PDF document text
    • https://cdn.sqhk.co/tevenijubuso/ihjhdt2/apology_letter_format_for_boss.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_6044614354e01.pdfIn PDF document text
    • https://visemuturivawo.weebly.com/uploads/1/3/4/6/134673250/towiwojafadinojoma.pdfIn PDF document text
    • https://tobosuxonekid.weebly.com/uploads/1/3/4/4/134493818/febasuz.pdfIn PDF document text
    • https://lelebozo.weebly.com/uploads/1/3/4/5/134578107/fuwoladitorusojitaro.pdfIn PDF document text
    • https://cdn.sqhk.co/batitiviz/jegfHig/maxpreps_high_school_football_playoffs.pdfIn PDF document text
    • https://wewuketis.weebly.com/uploads/1/3/5/3/135327502/dowutoxete-surusizosamega-siwosobemoribe-lupedarixeler.pdfIn PDF document text
    • https://cdn.sqhk.co/vitelodikef/hh2gjig/45682495491.pdfIn PDF document text
    • https://cdn.sqhk.co/zozevuxe/jbhgulh/panerog.pdfIn PDF document text
    • https://radobejaka.weebly.com/uploads/1/3/5/4/135400195/eab773b63a9ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3044ac2c-b171-4c12-9624-2a128cb01f0e/daisy_miller_a_study_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33921ecd-6756-4e07-b929-19fa283d608a/cost_of_living_canada_2020_increase.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/37192072243.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/toronto_fun_guide_swimming_north_york.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_off0000cb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB83 5368 bytes
SHA-256: 6cbda1855a453d09c4868393e2cb21825f744dda8eeb812ea08b52c8b0617522
font_01_sfnt_off0000ddb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB8 10452 bytes
SHA-256: ea4cd5dae6671f462d743a1a5712d51c033709e9730d96054ec38905fbb5ae12