Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5fc651b3c045e6e…

MALICIOUS

PDF

38.2 KB Created: 2020-10-18 12:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7d8013ae547f2c894ccf3e551e52faa7 SHA-1: c340fefeeba91cca71a4920250a8f69a1d48c096 SHA-256: b5fc651b3c045e6e4fb1a64b3d31a3cd0fb525786f477aa0e77913d067f9f46d
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=delete+metadata+pdf+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5f89060c242d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f883cbf87228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5f88ec03bd8e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f8ac6efb8298.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/7538137.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/9d55910782.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3731638.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/numevezo_dokadoxazeta_funivijuvij.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/32b02d.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/805b85ce-0a1c-4123-b4ca-f58ccdcdaeb2/somep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0154b543-364f-44c3-90b0-e8de7dd3eaa8/melonufegadusiwexupajig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6bce59-2f11-426d-a768-39f09622344a/verasonadelepif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d40ada-faf1-4c4e-9772-cafc2e488d27/xatotiletupef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8050/6773/files/13522069408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75d9447b-a0df-4bae-8d07-56d34842c623/zadebinewomaxikideg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8baddb1a-0580-475d-96f6-7b50865fe686/vifufipovawakode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7bcb83e-fe2a-4999-b52e-e6b48bdc0890/zutotiwinafita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf19968f-5615-44c5-a774-60eb29c85a75/86516239442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/setojubazilukizativuzig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9416/1605/files/como_deixar_instagram_preto_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2430/9160/files/functional_manual_therapy_courses_in_india.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_off0000578a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x578A 4912 bytes
SHA-256: 24431bdc8b0ac8c8c0680b3296b7722a2fd8e279495bd4bd546ee01de36ee44d
font_01_sfnt_off0000683a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683A 10240 bytes
SHA-256: f032bbf08c4ed01d9e49f654e2cffda3b0e2ad41c067c81751f00167fd0fe298

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