Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d140d89aa1baa8…

MALICIOUS

PDF

71.7 KB Created: 2021-02-16 16:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4afdb1a7205eb2ea1c2d7497c36e638c SHA-1: 8597fd47dcf7c4f4ec9229ff322fa5b21d195812 SHA-256: b9d140d89aa1baa8fc557c4aae92be01a774058fba2a6dade18fcc8619f2cfbe
186 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
  • 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.
  • 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://seumenha.ru/wix?keyword=dolphin+gamecube+apk+download PDF link annotation
    • https://cdn.sqhk.co/vabalogu/hetigw2/home_assistant_zigbee_usb.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/b9ehiha/91160397996.pdfIn PDF document text
    • https://toruganaduloxo.weebly.com/uploads/1/3/5/3/135347606/gegowokixikaz_vedar_rirurusinin.pdfIn PDF document text
    • https://gozerivolese.weebly.com/uploads/1/3/4/2/134265833/zixafava.pdfIn PDF document text
    • https://cdn.sqhk.co/texojijoraso/QhiO88Y/28271397276.pdfIn PDF document text
    • http://chuvashovfamily.ru/vekugebotusegazarugirasutz0gw.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/jchcAji/19162470408.pdfIn PDF document text
    • http://wuwisometojone.66ghz.com/english_grammar_worksheets_grade_1.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/5FORibj/xunadoxuj.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/8362600.pdfIn PDF document text
    • https://muvekova.weebly.com/uploads/1/3/5/3/135394778/dijiwaj-nunevenexup-godutuva.pdfIn PDF document text
    • http://how2clever.com/mopejegubijubifi6mlmp.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/pegebunov/90760674957.pdfIn PDF document text
    • http://zofekaxezujujom.rf.gd/relation_of_voltage_and_current_in_transformer.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/arc_length_of_a_curve.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/benekisorinotezodofin.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/billian_billian_akhan_free_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/kanebulajaxelimejikat.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_off0000d9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F3 5508 bytes
SHA-256: 2c40057919c6c165e8e9a82e62cba12cf3fc75bbb36393ddc5c38ccdd2eea40e
font_01_sfnt_off0000eca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA0 10348 bytes
SHA-256: 94f4f51361653b4d28ae1b7d2898afc8a2fb771d20fa4db59086bb0a6ac7222b

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