Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5a43dfba165d78…

MALICIOUS

PDF

38.4 KB Created: 2020-11-04 15:01:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a1ba933ec8bfc2a045eaddf6ca5c7aa0 SHA-1: d5920563184091521f13a886b9380dab15862b14 SHA-256: 0e5a43dfba165d780ee2f954d07bcf7ee12dc4cb5e285c9de28227efe2e3c8c6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/123?keyword=idgo+com+activate In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f8bbf0629488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_5f993b0a958c9.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/gigepolusaxedofepiso.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/legovutupuxesex.pdfIn PDF document text
    • https://vezexozozufizus.weebly.com/uploads/1/3/4/3/134372857/jaxororivaninoko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f887f64c78a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450878/normal_5fa248dff28ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/tevajufogokekulek.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/free_crack_giveaway_gif.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/long_term_strategy_planning.pdfIn PDF document text
    • https://s3.amazonaws.com/konimowu/christmas_cactus_leaves_are_yellowing.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/19162114172.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_off00005ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC0 4952 bytes
SHA-256: cbdc385d30be340b4b832d3bfa1652efd3abccd0489b32e1a702aed705e2c562
font_01_sfnt_off00006b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B93 10016 bytes
SHA-256: 89b0fc8bc9ebddb70bbaee3c72e78de2617dd3fc64ebf41878155e9b6194dc29

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