Malicious PDF — malware analysis report

Static analysis result for SHA-256 372b631b5f56eba7…

MALICIOUS

PDF

72.4 KB Created: 2021-02-25 04:18:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: eef9e04c1d666b515fcdaecfe269727b SHA-1: 479a7dd950f2b574b6f0930cb12aa282b4763f1e SHA-256: 372b631b5f56eba715ccf28436cd95f11528b67b11f772cc4169accff4b41598
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/award?keyword=old+school+runescape+bonds+guide PDF link annotation
    • https://nibevomixosu.weebly.com/uploads/1/3/4/1/134108547/lozotebetupexi-bonav.pdfIn PDF document text
    • https://bewobuvepo.weebly.com/uploads/1/3/2/6/132695749/3fc93b9e4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455406/normal_6027e1903ac2b.pdfIn PDF document text
    • https://kubududowu.weebly.com/uploads/1/3/5/3/135349078/nolafokogurowaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425009/normal_603578f4dfe82.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/matelawol-wejiwidaxede.pdfIn PDF document text
    • https://kesuvovim.weebly.com/uploads/1/3/5/3/135317554/dopetoruzuvixukofi.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/altered_carbon_season_2_episode_2_soundtrack.pdfIn PDF document text
    • https://jiwonilasipa.weebly.com/uploads/1/3/4/3/134313366/e97797a9a00e63.pdfIn PDF document text
    • https://radixukawatezod.weebly.com/uploads/1/3/4/6/134645496/4016139.pdfIn PDF document text
    • https://kuserivexujeza.weebly.com/uploads/1/3/4/3/134331384/584215.pdfIn PDF document text
    • https://luwegojozokozop.weebly.com/uploads/1/3/0/9/130969796/sigexew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453720/normal_600b78c86a1a4.pdfIn PDF document text
    • https://jonurimexiv.weebly.com/uploads/1/3/4/3/134321783/d90e4.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/CjeOm4D/diy_masquerade_mask_ideas_for_guys.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://manosotidokef.myartsonline.com/how_to_write_a_response_paper_for_philosophy.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/70225206813.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_off0000deef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEF 5504 bytes
SHA-256: 03f903a5b3875e2cfc69425e1d50983b56db21d87a4548e6790f6d8bd8fd0ded
font_01_sfnt_off0000f191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF191 10332 bytes
SHA-256: 6c732157de400709f0ae448debc7da1a4b7c8a2d75694d38390261db4977e202

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