Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4d3609c97f546c3…

MALICIOUS

PDF

49.1 KB Created: 2020-10-19 06:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d8de4037f9349e66110ae1facbcc8efb SHA-1: 2da93f2b7f26258be2c7b9d45f401c018df2dd26 SHA-256: a4d3609c97f546c37f6889e3bea341ba4e31e26f2c1f39e78731371d0f5315dc
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://gettraff.ru/123?keyword=mirroring+app+for+android In PDF document text
    • https://nulakumoxuguv.weebly.com/uploads/1/3/1/8/131871970/jegadubo.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/xiwepakazijo-wuwabumagefupud-xuwobogu.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/813cf1644869f.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/7349712.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/kixisoliwef.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/c88f9ecd4.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/palaj_xofepevez.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/8699562.pdfIn PDF document text
    • https://nepufetok.weebly.com/uploads/1/3/1/4/131438640/lewetomilijejebidowu.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5f8cc1ba436e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f8bf63a4b095.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3629/0467/files/manual_magellan_8500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/63638230419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46992a3e-d4da-4b93-bd7b-10dd377d7472/doxife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde55c56-ad48-42fe-a455-2314c6589054/89506350000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64c4fb5-5d40-4699-ad77-171aad59d9ff/zudegexewalodixutozojuwir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeb1c15e-1434-48f5-ab3b-1560cfa8d6d2/sugukogalap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57005980-087f-470c-b821-5b27ddad0707/rikejaji.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_off0000768f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x768F 5004 bytes
SHA-256: 64c44bc5a752abbf37864058834b35e59189b1391751da3f2b1bac70e3e4adbd
font_01_sfnt_off000087ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87AE 15408 bytes
SHA-256: 3ce8d47af37980e0c1d67de6dd37e81e443332d59c4f3c3dc812fd6fd3df91cc

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