Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab4388989638b1c…

MALICIOUS

PDF

44.0 KB Created: 2020-10-15 07:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fc5458a546c187e76cbf786f2f1275d4 SHA-1: 70943ba9891ef823d95094bdff144c2bd6514562 SHA-256: 2ab4388989638b1c8c5467af1ffd82d1395308a16a39e6b3920e0d0f2194bac6
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=descargar+yowhatsapp+2020+para+android In PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/973a38457.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/3177652.pdfIn PDF document text
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/7573714.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8980310.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/lekofexeb-liwabuwidis-xegakubavut-lanagagiwodu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5f8773e5cceae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f876b025e3f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f87122e54893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f8708aaf1d47.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/5650151.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fesixukorupu.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/lomewenidududibimib.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/buwobu.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/fukun-zexepimikupi-jutanu-garibadile.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/e41b1fa8-dd68-4c03-82c7-f8c86ebb8a98/sorunitevolikudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e98f0622-367d-40d1-84db-87c498b6bb70/92293778822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975bcf0b-5157-45f4-9739-93c14f896212/9687359412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231f8931-b300-4145-a052-539fb863a0c8/24860950956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e55c5aa-17b9-4f79-b830-d91b9e09f12b/deboxetositoroga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e98babf-144c-445c-af0b-fb3b1e6f7fbd/48645996776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9971993d-2f90-4af6-afb8-7fcd0453a766/59493378953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf2d4697-5f46-4ae4-bc5c-51cb58b4d49b/56257035402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2065/0149/files/cutco_knife_sharpening_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8589/8945/files/vesur.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_off00006805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6805 5772 bytes
SHA-256: 63ec6db2b7362396d44bf5a0e8b6b54e170f11122314e440722b5e82118c6a40
font_01_sfnt_off00007bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBB 12140 bytes
SHA-256: fb893eee2ef591f7eacf68dc46f67a06b223bdfa844772fe85492ae46e6237ae

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