Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cda549f7ca8837a…

MALICIOUS

PDF

65.7 KB Created: 2021-03-01 03:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f90badeb58713dd47c35506a6a38e3c1 SHA-1: e930262fbd3ba3167bfe369db3d709e33b11fa28 SHA-256: 9cda549f7ca8837a4575a685de54f71b985d50f0b73166f7ebd9ddd0fb83dc23
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://leonvi.ru/award?keyword=nc+dmv+license+test+quizlet+2020 PDF link annotation
    • https://cdn.sqhk.co/mizogujuzo/GjiV8hg/48487850603.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/rjijhhh/51516840909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483345/normal_600af57e78489.pdfIn PDF document text
    • https://tabowemonikose.weebly.com/uploads/1/3/5/9/135957185/8104707.pdfIn PDF document text
    • https://cdn.sqhk.co/somisafeg/LgcgcOu/homeschooling_programs_for_kindergarten.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413975/normal_5fec22635bb0f.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/2KjiFhf/lycamobile_wifi_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/bujutinape/i3ChcMc/zapugifulof.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/cjiggDW/sepobudex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417140/normal_5fc7fb90dfe0c.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/bjkigjf/lobaturoro.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/gfRwdie/phoenix_craigslist_for_sale_furniture.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501660/normal_6023893d9ee5b.pdfIn PDF document text
    • https://fipupoluvov.weebly.com/uploads/1/3/0/7/130775710/32fcd8ca362b.pdfIn PDF document text
    • https://pulijapejupexeb.weebly.com/uploads/1/3/4/0/134041872/5582800.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejoselox.epizy.com/inteligencia_emocional_definicion_rae.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/lezaxenakeboduzowabifitep.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/marodivovemukazupibi.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/dog_man_fetch_22_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/interview_answers_tell_me_about_yourself.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_off0000c739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC739 5260 bytes
SHA-256: 29adaac2f5c23b40d17f31ee8cba868da773fbcd4c9386fc0296d493102eb432
font_01_sfnt_off0000d921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD921 9376 bytes
SHA-256: cbff94a03b53f6fcdd7d4816df500689728928e19f0479b69fcbe348f9c343ff

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