Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8a6aa40bd5e926…

MALICIOUS

PDF

43.6 KB Created: 2020-11-09 07:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 0ba6b5d03477f3345926c8b186cb8a5f SHA-1: 3f20707e1db41fe4f26116dd9dad8d4d2dc443e8 SHA-256: dd8a6aa40bd5e926c97d932213a7f671de4204fe8c0d47bbd9f56f5b5525e798
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?keyword=rf30hbedbsr+service+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5f9cd7a5af0cf.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/nolimiperufo.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/5094659.pdfIn PDF document text
    • https://xeponadutowa.weebly.com/uploads/1/3/4/6/134612209/a791dd9bad2.pdfIn PDF document text
    • https://gofegupozomo.weebly.com/uploads/1/3/4/4/134479888/f5c72142da2b8.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/f32a19ad1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f872255564e8.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/wekudusoxakimujere.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388614/normal_5f90b97b0fc04.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/mipebufetoxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gowatomu.files.wordpress.com/2020/11/carrier_aire_acondicionado_manual.pdfIn PDF document text
    • https://bogenani.files.wordpress.com/2020/11/paleo_diet_chart_for_vegetarians.pdfIn PDF document text
    • https://wurisubi.files.wordpress.com/2020/11/319w_singer_sewing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be89e00a-92cc-4ed1-935f-0614f3ad08bc/binulufubopabuxuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba53733-f5a2-4e48-a31a-6fc4690570f8/does_insurance_cover_vasectomy.pdfIn PDF document text
    • https://junavisuroda.files.wordpress.com/2020/11/zojelabexaxazevig.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_off00006c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5A 5772 bytes
SHA-256: 1b82bae91ed2af6aec3ad806ca4829dad48097b9bbd9e549078743d53a4bc97c
font_01_sfnt_off00007fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDB 9744 bytes
SHA-256: 6c429a958567501c463dbd4c551c82b3c2d480b70fc12ea3e643c411163c634c

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