Malicious PDF — malware analysis report

Static analysis result for SHA-256 db24086a6b5ba5c4…

MALICIOUS

PDF

45.0 KB Created: 2020-10-25 14:15:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 233d8af5716e35cdc6f413760b68ccd8 SHA-1: 08142b503ba1809a1ebace4d558be092285ce1bc SHA-256: db24086a6b5ba5c45e1b914b1dc75e7035f48191170c36307a98c784d68d04dc
102 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'coupon template free download', aligning with the SE_INVOICE_LURE heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/strik?keyword=coupon+template+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f87bc257b033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_5f93f9c173980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404287/normal_5f93804cd652b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5f8e4ab0bf06d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f880d77ebf2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_5f953d81b28b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5f894771da68f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383586/normal_5f8d668534deb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389355/normal_5f8f88993b150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f883af56a38f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_5f9395eadd18d.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/9e2db3ca-1cb7-4bd1-a660-42c5ba84e0a1/zalurad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7e1e95-1412-4b1f-933e-d788f12011b4/27770371585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a837e517-fd30-414d-89db-47278d4fd2b3/royal_likes_apk_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee48c50-780e-437b-b278-bbd0e3beb123/44683269941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae4ff8e-f61d-48c3-a61c-54cd7f4d2d01/43619926590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fef64455-9983-43a6-ad14-45050a457a1c/82065506753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e049fa-de5b-4dea-973f-4b384b6b35b7/paraiso_aventura_las_huertas_tlaquiltenango_mor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d3371f7-9c71-4363-97c3-3380570e786c/92359392806.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/71989100191.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/ano_ang_lakbay_sanaysay.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/tekitu.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/86935610464.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/betrayal_legacy_rulebook.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000738b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x738B 5004 bytes
SHA-256: afeb03e6ba7c6fa17aeef9602b6fc4614a2921715c9d7c96352ab9090eda7090
font_01_sfnt_off0000848a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x848A 9776 bytes
SHA-256: a4e9c556bf194f7486bb980e5b3f25944ecd0954a41cebc88db785b5ae799ae9

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