Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6862fa1e6c19891…

MALICIOUS

PDF

64.7 KB Created: 2020-11-26 08:57:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8f9cc7766415463ac1442ea934e38255 SHA-1: 60ae594cfa74aa1d44af0264d1abe874ad609fb8 SHA-256: b6862fa1e6c19891dfab8b72a045c1213c7992a93572b10b011c3a58a1dd02f1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many pointing to other PDF files hosted on various platforms. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a network of linked PDFs, likely for SEO manipulation or to distribute malicious content. While no scripts were directly extracted, the presence of numerous external URLs suggests a potential for downloading further payloads or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://trafffi.ru/123?utm_term=build+my+life+pdf+e PDF link annotation
    • https://mereduje.weebly.com/uploads/1/3/4/7/134751500/bunuxapux-muwomixezu-runenukivedin.pdfIn PDF document text
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/mirepexi-tavajatixotama-nedud-zemutini.pdfIn PDF document text
    • https://nufodovepitad.weebly.com/uploads/1/3/4/7/134718778/pejotivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_5fbc886329575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389074/normal_5f8e7eed203dc.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/8151146.pdfIn PDF document text
    • http://smarturlIn 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/e7d35b74-04ea-42e2-8ed7-8abbae2c456f/27396314173.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/metabolismo_de_aminoacidos_y_proteinas.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/crash_course_world_history_6_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/93247185226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/107c95f4-119b-4dcb-b17d-aaac9bbfd793/67870719383.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/bronkiektasis_pada_anak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f362990-d204-42e9-b60f-9eb3d73c8771/mikojizoxonewotituwur.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_off0000ba93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA93 4856 bytes
SHA-256: 1d270460220551da8926010808db765fe25cd817bce3e42bd5eea9a6556e9aa3
font_01_sfnt_off0000cb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB19 13752 bytes
SHA-256: f4059e33ca498f3506d200a09454c37d19ba9be12ff39dd52d1aaa5676f1c1e4

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