Malicious PDF — malware analysis report

Static analysis result for SHA-256 98988134109179ba…

MALICIOUS

PDF

44.0 KB Created: 2020-10-26 11:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e554651deab43353135bb15f64394baa SHA-1: 6deb9da83428c17853898ff11f1c681fc64b3a8b SHA-256: 98988134109179baa5445321b8a6fda1fcd6f939ed7d95e7f276d69dc28c6df5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading content. The presence of numerous links, many pointing to benign external PDFs, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ttraff.me/pify?keyword=wapking+.bhojpuri+movie+song+all In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_5f8ff4d8c04e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412908/normal_5f95a930cc2e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f92c3f118585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5f8e6cef47eca.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/jopawogodowi-kawekaseb-vimani-xuwekir.pdfIn PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/4329486.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/1dad00ade338b1.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/cffffe59-a87d-47f8-b63e-f7f893e97437/52779283141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d5720e1-201a-445d-ab83-b3c0489d61aa/5s_posters_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c772a0-8afe-453b-aa2a-d0a8fea9d81c/99330861096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a006dc76-6446-488a-87e6-78dd5aa4bfed/how_to_get_to_saffron_city.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/prova_auditor_fiscal_receita_federal_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/nopijibizomi.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/blister_packaging_market.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/fopaxusefevanupezaf.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/12668727504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5aaffb-2155-417d-ae6a-a067276d0f25/rezevaloto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ea66cef-fbe5-4977-b83c-b97dce19ae4c/nevada_grant_deed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1132f8a2-0e44-4333-89c6-537ec1db8c96/85531562480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6dabc58-3f20-4031-a93a-c6df3ac968cb/fububek.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_off00006acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACB 5616 bytes
SHA-256: db978d6a44a71fb5920ef5369ce155b5369335af212ac88c423febcafe6897af
font_01_sfnt_off00007dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCC 10808 bytes
SHA-256: d5df997fbbf9214828a61c11425c0052620c0a0ccb440598c2f23efe5417b993

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