Malicious PDF — malware analysis report

Static analysis result for SHA-256 c51b9af217cebecd…

MALICIOUS

PDF

64.8 KB Created: 2021-02-22 21:58:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a5eaae982c39aa3e589e607dfd46e263 SHA-1: fab91a90d3e59ec0ac949dd117394d7541f03d23 SHA-256: c51b9af217cebecd7ac83f2594d610d79487948dbe6247d2124dd5f184d4fb97
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=elements+compounds+and+mixtures+worksheet+grade+6 PDF link annotation
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/308957.pdfIn PDF document text
    • https://pigokujedaxe.weebly.com/uploads/1/3/0/7/130740563/27355f195657.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480880/normal_5ff091311cf38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_5fd904c3010cc.pdfIn PDF document text
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/21c939.pdfIn PDF document text
    • https://wovovude.weebly.com/uploads/1/3/1/3/131397940/difimosumul-jurogamaropetim-damel.pdfIn PDF document text
    • https://polabobaxadujo.weebly.com/uploads/1/3/4/7/134775235/4922c83fc1c.pdfIn PDF document text
    • https://marizezibafive.weebly.com/uploads/1/3/4/8/134865590/kanox.pdfIn PDF document text
    • https://xutonipojoneri.weebly.com/uploads/1/3/4/6/134667901/5f1ba1815b.pdfIn PDF document text
    • http://karnaval.host/d_d_character_sheet_ipadv8e2s.pdfIn PDF document text
    • https://pasugewu.weebly.com/uploads/1/3/1/0/131071180/sebajabaruk.pdfIn PDF document text
    • http://kismyketio.com/2010_chevrolet_camaro_2ss_rs_packagep6krf.pdfIn PDF document text
    • https://reponobokuwe.weebly.com/uploads/1/3/5/4/135401207/fusezarunokarapej.pdfIn PDF document text
    • https://ritukananikunid.weebly.com/uploads/1/3/0/9/130969552/4808731.pdfIn PDF document text
    • http://beautysss.site/homelite_sx_135_carburetore4y3p.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/mibiwivanetuj/tutapugowo.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/exponents_8th_grade_common_core_worksheets.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_off0000bf9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF9A 5824 bytes
SHA-256: 31eca9b44bc0d63ce73b1373807db33d4623b0e1acfa5addd09355254fa8f662
font_01_sfnt_off0000d35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35D 10164 bytes
SHA-256: bf45d1f7796c1c633769152782c09f36e1c581b3a3e3e32198c3d549506ce24f