Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc4052d4b1413919…

MALICIOUS

PDF

60.1 KB Created: 2020-11-11 03:09:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: d1d0272ba6e7dc818659eeffd2fc2a19 SHA-1: 792c18c6b4c929529e521e0145a43f6f14ec7919 SHA-256: bc4052d4b14139191f81d06ef1899dac9f3256c5578e2d819bf40cc0df46219a
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?keyword=google+case+study+solution In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5f8cc3f719ae6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_5f99b027b411a.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/34861edfbb84.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/6542aa.pdfIn PDF document text
    • https://xabopefasuliwik.weebly.com/uploads/1/3/4/4/134445681/5004247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5f87c2c57d722.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/nopamobilepulot_kuxobugiro_kakaku.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/bijawixevibo-metamosukes-jekulukiz-tesoromiwi.pdfIn PDF document text
    • https://lebidupevi.weebly.com/uploads/1/3/4/3/134319251/7f6a763.pdfIn PDF document text
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/polabus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5faa3666eb44c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_5fa6fd158a2cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab173755-1019-4350-aeb5-41ef99798141/25685351566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae9496a-6220-4934-b164-73e1ea6e42fa/22570145047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e85fc37-fae2-4a0e-9c7b-eaa46adc1d70/rita_bennett_morgan.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_off0000b1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1FB 5144 bytes
SHA-256: 6ff62da002246bd62faf4a0c2b838586ebc0cc2b62217e7a397f5cbecb860291
font_01_sfnt_off0000c39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39D 9552 bytes
SHA-256: 8eab407e76eb700e2ac42e1dc4106498867043c4e632eb4cf430cb80313e2773

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