Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1000533475f900d…

MALICIOUS

PDF

80.1 KB Created: 2021-05-01 15:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b0061c418971ccd700ebff430f40cae4 SHA-1: 55ad17d688ee76c7d044fb866db37bd50ad0ae52 SHA-256: d1000533475f900d32b1e3d2026eed4e071f906512f16cc05a3d474d70d1af00
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

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://mezovuduw.ru/strik?utm_term=the+logic+of+god+ravi+zacharias+free+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450634/normal_6024b56397660.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501789/normal_5fcb391241fdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466664/normal_603bcf8e5b23f.pdfIn PDF document text
    • http://abwaab.su/jafuroxubovopusonir0vb52.pdfIn PDF document text
    • http://uaregroup.com/lopokaguvexoborade72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426059/normal_5fc8c1180ecdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_60251e9f516b4.pdfIn PDF document text
    • http://study-english-02.space/889046623469sjlm.pdfIn PDF document text
    • http://webdefilmizle.com/zilugedowejoko3fnjj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kanabikovokes.epizy.com/caulerpa_sertularioides.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/barron_reading_test_3_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92589943-000c-42e8-811f-5548224b2205/automatic_west_bend_bread_maker_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/hp_laserjet_pro_400_mfp_m425dn_price_in_kenya.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/wudefofogokudag.pdfIn PDF document text
    • http://vezevuzu.epizy.com/tepir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa8d9ba-e5dc-4e26-b09c-50ea2622c702/multiplying_fractions_worksheets_for_6th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c864770d-8d0e-4a8b-aa82-75b42ad2b94e/soil_mechanics_and_foundation_engineering_by_sk_garg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40f6e56d-259f-43e6-b366-0864db40d107/how_do_you_add_apps_to_xfinity_x1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61428cfb-5152-4ea1-b0a1-636fea8de7e3/84367627391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dffc6526-d5c3-46a8-b58f-9b2fe2a6d54b/wakamowigaxinepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fdfac48-9b86-4265-a370-1c3b418e052f/11606256780.pdfIn PDF document text
    • http://gogotefabup.rf.gd/zenorasotaverosijaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d53f74e7-7f72-4934-8453-bd4e68f581a9/fevusavegogijepabibiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3af40a3d-e474-4299-927e-146218210f7f/relation_and_function_definition.pdfIn PDF document text
    • http://muduwabu.rf.gd/dejupoviv.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_off0000f98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 5476 bytes
SHA-256: 40282842bdea41195cf954910ff0c01be3b9b3a07c2e9f9f87e421d67763d850
font_01_sfnt_off00010c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3F 11328 bytes
SHA-256: c932972307f041140153acfeaeea862ea1393711ef19c7c603c1488e0cd7bd78

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