Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3318027f9f1d54…

MALICIOUS

PDF

177.3 KB Created: 2020-11-09 06:36:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d45f603626f46a8ed0c38270205bea4c SHA-1: dfe1217b3d9d4ba70cdf5c466f1813df54a2f4a9 SHA-256: 0e3318027f9f1d543afbf2ca54ebb47878ea4074257844f274eaaffc591e1c08
124 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 0.9998

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 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.
  • 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://cctraff.ru/123?keyword=galaxy+angel+sim+date+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5f9cc055ba7eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lixuzab.files.wordpress.com/2020/11/79083426953.pdfIn PDF document text
    • https://bejukozox.files.wordpress.com/2020/11/taxemudaji.pdfIn PDF document text
    • https://xepaxaw.files.wordpress.com/2020/11/eliseu_martins_contabilidade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e303f3f7-2077-4788-847d-eb523d85d879/42972222884.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/mevudefusinitoti.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/basic_electrical_by_bl_theraja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e28e8298-bd7c-4398-9886-1debcc18d791/fokadevilave.pdfIn PDF document text
    • https://navafukowo.files.wordpress.com/2020/11/30806907799.pdfIn PDF document text
    • https://jivisep.files.wordpress.com/2020/11/krishna_s_chordata.pdfIn PDF document text
    • https://xikirezeso.files.wordpress.com/2020/11/mitim.pdfIn PDF document text
    • https://nogosipemom.files.wordpress.com/2020/11/new_manual_lathes.pdfIn PDF document text
    • https://podenujo.files.wordpress.com/2020/11/bekonagajimifujegidozoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10528360-a79b-47b4-a088-d030c05eae86/zopaviremuroma.pdfIn PDF document text
    • https://motulod.files.wordpress.com/2020/11/63640009167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/750de02e-1341-4889-bd7e-0df07284aa30/dipovexero.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24566 10932 bytes
SHA-256: 80cacab99ea217cd2ac7b11eb8758c546b5c8e59e21a98dc839906e590d53bcd
font_01_sfnt_off00026912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26912 5252 bytes
SHA-256: c2917661c5bda49e7305e26f79be7563313bb8d67712ef1717ae65887bdb17da
font_02_sfnt_off00027af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27AF2 11304 bytes
SHA-256: f2a051ce5adfbb1071039957946451c52338626aebdbc23671d846d49a9e768b
font_03_sfnt_off0002a16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A16E 16284 bytes
SHA-256: e9f6281dbbd8e810ee26c7e10c0fc1afc76c2137e8307d5eb2c3d35196de0bdc

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