Malicious PDF — malware analysis report

Static analysis result for SHA-256 f861a4940febe7c9…

MALICIOUS

PDF

40.9 KB Created: 2020-11-08 10:06:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 0da36b2dfe4409dd9c301eb9a5b67754 SHA-1: 58c00cb6aa43e26b75f3e0d4c0ae85ca40284ef2 SHA-256: f861a4940febe7c967e0ab204d1c0e588d80b606160aa157584b1b65120377ff
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafficel.ru/aws?keyword=plant+cells+vs+animal+cells+worksheet PDF link annotation
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/aad6d28b8b4211.pdfIn PDF document text
    • https://nomuxivobuga.weebly.com/uploads/1/3/4/4/134483798/fegidamasam_fezifet_jogupav.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/ba8917e282f650e.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/953dd107.pdfIn PDF document text
    • https://sumibudagat.weebly.com/uploads/1/3/4/3/134310224/rigikupeninenufumewa.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/5401885.pdfIn PDF document text
    • https://bosesabefo.weebly.com/uploads/1/3/4/3/134362720/032538a7c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pewivawo.files.wordpress.com/2020/11/jubozuwirarubuxaw.pdfIn PDF document text
    • https://sopudag.files.wordpress.com/2020/11/99817875930.pdfIn PDF document text
    • https://ganibeme.files.wordpress.com/2020/11/fundamentals_of_electric_circuits_fifth_edition_solutions_manual.pdfIn PDF document text
    • https://teviwuder.files.wordpress.com/2020/11/19835483222.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/4866760512.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/67728004733.pdfIn PDF document text
    • https://tetululu.files.wordpress.com/2020/11/day_planner_template_in_excel.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_off00006195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6195 5256 bytes
SHA-256: 094a6671d8bcc6c878c995958e4b766f081e696112ed18c82bf1e749d8515755
font_01_sfnt_off0000735d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735D 10260 bytes
SHA-256: e5293946d8744776e1352fb44bfb82d011f30237bdd93955a79d1e9c142d4d76

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