Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbc4b2ddb655d16…

MALICIOUS

PDF

68.2 KB Created: 2021-02-22 21:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 97756d191a7245c85efa4e58a92c9802 SHA-1: 634ad5f9eaa784026cb6b2fc6f58a44098955b6b SHA-256: afbc4b2ddb655d16128b9c49541fdf9eb919699bf6909a97a5b27e7eb9103077
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://jacksth.ru/wix?keyword=the+kubert+school+dover+nj PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383314/normal_602b0755c6f55.pdfIn PDF document text
    • https://lekemevegov.weebly.com/uploads/1/3/1/4/131410090/7352705.pdfIn PDF document text
    • https://dukuvelawabuze.weebly.com/uploads/1/3/0/9/130969723/366fa324d15676a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485442/normal_60055add8169f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497356/normal_5ff0e89714fbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_6025200a3f93d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412767/normal_601bbbd9e7106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_602ec1bf6e6d6.pdfIn PDF document text
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/7cc84b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_6032f57432b31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zivuvosiz.epizy.com/coroners_and_justice_act_2009.pdfIn PDF document text
    • http://sufumawug.epizy.com/81638842609.pdfIn PDF document text
    • http://fesumoxidixup.rf.gd/gopogafikorabosu.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/nuseroxolexojipilabexop.pdfIn PDF document text
    • http://ravimerafewede.epizy.com/pearson_chemistry_textbook_2012.pdfIn PDF document text
    • http://tezadoni.rf.gd/busqueda_segura_de_informacion_en_redes.pdfIn PDF document text
    • http://wasalesex.epizy.com/bihar_masti_bhojpuri_movie_2019.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_off0000ce35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE35 5108 bytes
SHA-256: b3c69fd05f14b3399db3d0c00f9484cc8a80a285e5200d9ef0aca88ceda90bf6
font_01_sfnt_off0000df92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF92 10764 bytes
SHA-256: b15afe05b9de9bb2542620cbf32c2fe51a2aa6cf9c42398274932ea636ed07f8

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