Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e64a89181200f8a…

MALICIOUS

PDF

80.2 KB Created: 2021-03-25 05:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 12cb33713fa6f847d8d8fd3b99d550c6 SHA-1: d039e8016661e620e9238ccd5f910fe24c8b6ff6 SHA-256: 3e64a89181200f8ae0b50944eea15630f53cd4ea00510eb39ef22915a3e40630
66 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a malicious link farm, with numerous embedded URLs pointing to potentially harmful content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirms the suspicious nature of the linked domains. While no scripts were explicitly extracted, the presence of embedded URIs suggests an attempt to redirect the user to malicious websites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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.
  • 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://nipisod.ru/award?keyword=micro+irrigation+system+design+pdf PDF link annotation
    • https://cdn.sqhk.co/nilamemiw/tjfheLJ/sunshine_house_daycare_frisco_tx.pdfIn PDF document text
    • http://sarhello.online/ebook_free5kpoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477156/normal_6059ebe75f2b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375702/normal_5ffc69fa0f61c.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/7ihXiec/idle_guns_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/xilobotinisi/jDounYh/zumbla_deluxe_level_353.pdfIn PDF document text
    • https://cdn.sqhk.co/minofavazu/sidjgrt/94596089702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_600a849f5fb43.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvitatutuv/hcOuTdd/babylon_2055_pinball_achievements.pdfIn PDF document text
    • http://meblik.su/87319958429x6gxf.pdfIn PDF document text
    • http://max-lifting.store/vikisurunovexaezlw8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://simavanexija.rf.gd/2847713035.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_88eecf7fd6674c62b5ddebcd1dcbf0d1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/403d6c3a-da27-443c-ba87-0866da6bc764/polaris_side_by_side_170_top_speed_2013.pdfIn PDF document text
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_0fcbee261c904fa083e903b222b1aa29.pdf?index=trueIn PDF document text
    • http://gobunapuvifug.epizy.com/bovevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc14750-9389-4254-b6d1-0d18c2c7a0a5/5482842567.pdfIn PDF document text
    • http://vakusidoler.epizy.com/29873401729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fab16ce-ee93-45a6-b634-8db78fd3f6da/how_to_fix_chamberlain_liftmaster_garage_door.pdfIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_c7d8ca496bf94d0a8c1d98eefd3421a3.pdf?index=trueIn PDF document text
    • https://5e446c31-fcb6-4427-a178-91ee45bbff8b.filesusr.com/ugd/4e76b8_07c30a530f0a4f81a71ef018fb9a9a6a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd748473-cca4-4701-8bb4-db0d604f3fb4/logo_creator_software_for_windows_10.pdfIn PDF document text
    • http://valamujunitun.epizy.com/49287502921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edc7843d-a65e-47fd-87a5-d3f4e3e05309/zutuzidupisibijojenenisaz.pdfIn PDF document text
    • http://karatufi.epizy.com/32038050111.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_off0000fd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD29 5552 bytes
SHA-256: 7ff512429893a784ae27ad9556aed219bc9f2c2cd926817a8cfa0aac00e3cb70
font_01_sfnt_off0001100f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100F 10288 bytes
SHA-256: d8b0c7f492927c14c0bdb3805694dfeb900bfe6de578e9528f55f374c3095522

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