Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8040290649736e3…

MALICIOUS

PDF

75.5 KB Created: 2021-03-07 07:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0f7089378ca63ce072eca6e48b9dc88d SHA-1: 89406e1ab4a816dcdd6605b48d3367dfb4249dc5 SHA-256: a8040290649736e3c623e637c5a8eebc7606a1753e4019cb941ca754cbafced6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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://dafemum.ru/award?keyword=a+monster+in+paris+french+cast In PDF document text
    • https://niloberu.weebly.com/uploads/1/3/0/7/130739427/e139698d3.pdfIn PDF document text
    • http://duvotikuvazax.22web.org/a_writers_reference_9th_edition_mla_citation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_603a6874589c6.pdfIn PDF document text
    • http://punubukotulanes.22web.org/58397511180.pdfIn PDF document text
    • https://nudametuwino.weebly.com/uploads/1/3/3/9/133997501/dotoporufesabaf.pdfIn PDF document text
    • https://kujafuzepod.weebly.com/uploads/1/3/1/6/131637430/2718930.pdfIn PDF document text
    • https://luzurojavozajin.weebly.com/uploads/1/3/6/0/136090511/renusatokoj.pdfIn PDF document text
    • https://vetakowiv.weebly.com/uploads/1/3/4/7/134733886/1337273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_6027d743df6f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bulujono/94992302578.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/editable_binder_cover_templates_printable.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_a4804e3f28ef4211989b4332bb655c54.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/burger_king_veggie_patty_ingredients.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_31f6bdc8acb84ec6933787e3700aeb67.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/kexusaw.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/sexogodiwalebosoxuzaki.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/97612438048.pdfIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_4ec1b0144f564690a3da4f6e8e13e091.pdf?index=trueIn 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_off0000e25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25F 5212 bytes
SHA-256: 00d0bdf1213ed9a2602177834edcf57504f2c97b76f055b0444721b8c3ff4e98
font_01_sfnt_off0000f3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F1 14692 bytes
SHA-256: 3eba7124980e4942652ca525e1754726e055f13edb8e9857a4abe43cc8c642a4

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