Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c5ecf78230c515…

MALICIOUS

PDF

41.6 KB Created: 2020-11-08 07:32:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: df91732d3de3fc013ee3f0c39527d54c SHA-1: a0f7afa047fd815f1e4870c7d3769c7a43ae0280 SHA-256: b3c5ecf78230c515ec96e4dd2a66907a91893074f40567ae15542ad5ab2a7a23
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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/123?keyword=bloons+td+5+hacked PDF link annotation
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/tebokedori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451375/normal_5fa4148fa57c5.pdfIn PDF document text
    • https://fibigator.weebly.com/uploads/1/3/4/3/134313363/vudumunudedo.pdfIn PDF document text
    • https://jaxobowes.weebly.com/uploads/1/3/4/5/134591409/mixawuregar.pdfIn PDF document text
    • https://makaxifosezopuv.weebly.com/uploads/1/3/4/5/134511124/vusokesubisudinede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f9972030d646.pdfIn PDF document text
    • https://vajibenutiw.weebly.com/uploads/1/3/4/4/134487234/roridovoguj_minupunujin_fifogu_xivokopipuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393911/normal_5f9599455e2ea.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/7a541dcf-5168-44b6-8d9a-ff8d2e05c683/16679109294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcac34b0-5d37-43d0-a860-b0f34dd92673/mobivexowafebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98346b93-148a-4c74-88e8-b2fbddeba50b/kazisofesometiredodal.pdfIn PDF document text
    • https://defimoni.files.wordpress.com/2020/11/jigexorujebovub.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_off00006362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6362 5168 bytes
SHA-256: dfdac1dfc367fb3d62cc927ddc10b116823f9d90cc6b7c52f306b5dec10c1a03
font_01_sfnt_off000074f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F8 10804 bytes
SHA-256: e36fa87cddbc3ea913913e02cf454cc8a82a3ffa63ccc560e4821d2201eaadfe