Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a692d1cba48624…

MALICIOUS

PDF

44.0 KB Created: 2020-10-16 07:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 45fabe0a29810fdb6c52e244ea05ecbe SHA-1: 5e82e290da315820097e2de6139b9d9974e89db1 SHA-256: c2a692d1cba48624b948077e9719033a23eb938dc0eb75f331245c64523b4a83
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://ggtraff.ru/123?keyword=leadership+theories+essay+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5f88c2e0a7ec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f874afcc3f00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f874cf09f8dd.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/1873605.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/napofujewub.pdfIn PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/2173021.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/fekoxezutuwixugiperi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f874e74ba6fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f88304fbf26b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f870de49f318.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/709f3789-078a-49b7-b03e-386bad1ba5af/togugavekurife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ffe8e0-6631-4806-8558-78db323c0b31/51349589277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc70046-669f-40d9-b948-6a3edd71bf3e/22120272595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9783/7734/files/96027215393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5349/3655/files/68352865712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7580/7648/files/fumenutupusokodanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4260/2140/files/506048100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5856/9628/files/happy_thanksgiving_images_free.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_off00006fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC6 5140 bytes
SHA-256: 413b60385fbedcf0be01a0fc86f249b10207078dda8f500e533d62ee20ef4ed4
font_01_sfnt_off00008144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8144 9936 bytes
SHA-256: 750fed6ca423b2462831b9d9992e50585f0f9970088b758a729a745fbddebd6c

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