Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d4b57054bd8504…

MALICIOUS

PDF

50.3 KB Created: 2020-11-08 06:53:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: e187456c90826b039968ecaec0b199d2 SHA-1: 4ae6c128ba402980fa498af24e7b42e5f9ed6e23 SHA-256: 72d4b57054bd8504b36f850a4e71b7c0a08448fb53aa1e91ff3bbbf4ff6e1cd7
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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=the+late+paper+pdf In PDF document text
    • https://xemamipu.weebly.com/uploads/1/3/0/8/130813095/85e3bc.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/8494558.pdfIn PDF document text
    • https://duxawedi.weebly.com/uploads/1/3/4/4/134477895/27b381.pdfIn PDF document text
    • https://majizozu.weebly.com/uploads/1/3/4/5/134598595/1323157.pdfIn PDF document text
    • https://zapidowezagija.weebly.com/uploads/1/3/4/0/134041255/poladuraw.pdfIn PDF document text
    • https://zavisedifigi.weebly.com/uploads/1/3/4/3/134316550/nopuniguna_remanovasiki.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://netadoliwobo.files.wordpress.com/2020/11/terraria_apk_full_latest_version_download.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/adobe_printer_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/1262028197.pdfIn PDF document text
    • https://rotadenig.files.wordpress.com/2020/11/82236523173.pdfIn PDF document text
    • https://demoxugu.files.wordpress.com/2020/11/gojixefubozunamum.pdfIn PDF document text
    • https://tinogive.files.wordpress.com/2020/11/abstract_algebra_an_introduction.pdfIn PDF document text
    • https://s3.amazonaws.com/kepevipawit/kenmore_dishwasher_13543_installation_guide.pdfIn PDF document text
    • https://rasofopob.files.wordpress.com/2020/11/2007_honda_ridgeline_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/60369820425.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_off00007af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF1 4424 bytes
SHA-256: 1c5a6154f46c9b23c3e73864acfd430ed0141c24e91b75aba58d3fc1d9e30b7c
font_01_sfnt_off00008a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A03 10540 bytes
SHA-256: 2a1e70c02e88027efdd66433767b2fb9ab3db35c0c8c988f83eed8d77d89ffed
font_02_sfnt_off0000add5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADD5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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