Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2bc86df8bca00c4…

MALICIOUS

PDF

72.6 KB Created: 2021-03-10 14:10:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 31024da745435752ea53979cdae5614a SHA-1: 614533aaceb7a2a7aa081c0e995226e0f9918358 SHA-256: d2bc86df8bca00c4ccac0872e8110d91f36986f67a9d35857b909bea3c3419aa
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/award?keyword=catholicism+series+study+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455669/normal_6041d0963c739.pdfIn PDF document text
    • https://petabururumeje.weebly.com/uploads/1/3/4/9/134902787/puguzaladi.pdfIn PDF document text
    • https://xuwejemeluk.weebly.com/uploads/1/3/4/3/134314543/jafud_jovegu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_602adbf00a4e4.pdfIn PDF document text
    • https://domafotenok.weebly.com/uploads/1/3/5/9/135973376/3969598.pdfIn PDF document text
    • https://baponejivo.weebly.com/uploads/1/3/5/9/135986917/donifafozasirisax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402503/normal_5feb01e6ca270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420608/normal_600b3eadb9510.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/hh2hcNr/sidemanidemaxenaluxed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413585/normal_5fcfb458bcdc6.pdfIn PDF document text
    • https://cdn.sqhk.co/rubalibuzodi/jbdjhjh/new_craftsman_homes_for_sale_near_me.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/jeponowon/lagu_alang_alang_sewu.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/vasewekakovoroxuvexerez.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/geographical_distribution_of_animals.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/sarkari_jobs_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/calendario_escolar_malaga_2018-_19.pdfIn PDF document text
    • http://zelixedamaxux.rf.gd/vinisotukud.pdfIn PDF document text
    • http://kekokid.epizy.com/how_to_manage_software_development_process.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_off0000df7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7F 5576 bytes
SHA-256: 3ec93f0894312c539f992982295a3b26eb33bd1cdec4c9d23621ff82fef10050
font_01_sfnt_off0000f253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF253 10324 bytes
SHA-256: c2be747e8c76025dbbaa28f88f025b6abd4bcc39bd34878bc6110339a154bde7