Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f50c111e4bfad5…

MALICIOUS

PDF

70.5 KB Created: 2020-11-11 01:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d8c31c1093fa90df5151e0a10e8454ef SHA-1: a47ee7f443bb59c902a630da3ea40bfca97876a3 SHA-256: 38f50c111e4bfad51a2198ff6ea433e67d0414c47aa2cc373d28f12cde0d7bb1
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/aws?keyword=coordinate+algebra+study+guide In PDF document text
    • https://robiduvasolowa.weebly.com/uploads/1/3/4/6/134657162/3857062.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/mowebalada.pdfIn PDF document text
    • https://vafuzetok.weebly.com/uploads/1/3/2/7/132740798/rafof-kabipukodukamob-surefexot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410431/normal_5f96f091d0d00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_5f88a748a945f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5f89573b77269.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/7c85ff5f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393179/normal_5f8f39a40dffa.pdfIn PDF document text
    • https://kenumobubedu.weebly.com/uploads/1/3/4/3/134370592/0115b8e3656f616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5f8eb2d9e22d2.pdfIn PDF document text
    • https://faxegosesu.weebly.com/uploads/1/3/4/5/134528451/jevifavitutipobaboni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/fopaga.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/resekavovinajekewotikiti.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/celestia_luna_between_dark_and_dawn.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACD 5140 bytes
SHA-256: 6625ed93b506ddf2e464b029c4d321ad956746bd1c79c5c429b3ed531f947ed9
font_01_sfnt_off0000dc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5A 10244 bytes
SHA-256: 05b824771ce9c51531f8ef1ac2363c6357de98c4efff1a484ca08193d72748ef
font_02_sfnt_off0000ff09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF09 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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