Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f826a304526861b…

MALICIOUS

PDF

40.9 KB Created: 2020-11-07 07:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: 82db892bc041ce8b835221c105700252 SHA-1: 0bc8c11afb0d8d31e0e06ad528c97e514ac73f4f SHA-256: 9f826a304526861b85d2ee6a260daa8f74f3ba2897fc738c757dfcfdd6330c69
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://cctraff.ru/aws?keyword=sift+heads+2+cheats+list In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f919d6670e71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449779/normal_5fa4ebaabbdb4.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://uploads.strikinglycdn.com/files/a40b52fa-288c-4005-b7c5-a08b98dac152/jagewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ad13387-32bb-45b4-b7d8-364c10a2d421/parizonemugejikud.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/gabizagamumarokidatanum.pdfIn PDF document text
    • https://s3.amazonaws.com/mupuraregonu/209630973.pdfIn PDF document text
    • https://kamajivap.files.wordpress.com/2020/11/pewunafixizu.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/gafumobufi.pdfIn PDF document text
    • https://gorujugiximu.files.wordpress.com/2020/11/karipevo.pdfIn PDF document text
    • https://sidelid.files.wordpress.com/2020/11/gaxonedavafe.pdfIn PDF document text
    • https://baginalikut.files.wordpress.com/2020/11/84444946400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/172181c8-8ff2-42d2-af7d-ae6412ce6cb0/vuwiwubujinigamowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38df6369-514f-43d9-855c-0eb9b0ffef9e/7625220018.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_off000053b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B1 4820 bytes
SHA-256: 32861846d7c6c92094fd8bf3bc52db5cf5f5fe3ac938fd38a89a80bb99ade206
font_01_sfnt_off00006416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6416 10756 bytes
SHA-256: 2c66930b730136135d1bf79ae6f502d077c0929bb304e8cf62360cb21f831e1c
font_02_sfnt_off000088e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E5 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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