Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3efdf7f749f8085…

MALICIOUS

PDF

73.2 KB Created: 2021-04-02 11:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 121317dadfe447ad3cabdf036076ce50 SHA-1: 57d30e9435c9e33aac2a38d79b09e9d7f3228bcf SHA-256: d3efdf7f749f80854f7cc8618af780a0087627b4eea312e7028546f6b69754e7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/strik?utm_term=sketchup+tutorial+pdf+download+free PDF link annotation
    • http://navaram.online/emperor_clock_company_model_300_seriesrqy18.pdfIn PDF document text
    • http://apsmall.space/mediamonkey_playlisten_mit_android_synchronisierenxm0xa.pdfIn PDF document text
    • http://menformula.xyz/sadadulavoxesutileforatofk07ap.pdfIn PDF document text
    • http://momentikshop.space/golf_hitting_mats_amazonf35sx.pdfIn PDF document text
    • http://ca-management.website/xutitirelufarudumic00.pdfIn PDF document text
    • https://vidimepimexuja.weebly.com/uploads/1/3/4/6/134626803/9086548.pdfIn PDF document text
    • http://fakts.design/jufezemixavg33d.pdfIn PDF document text
    • http://trylait.pro/fupatudigidejaxevemiizq79.pdfIn PDF document text
    • https://kenaveduku.weebly.com/uploads/1/3/0/8/130813649/27cb93.pdfIn PDF document text
    • http://b2b-servis.ru/family_room_bookshelf_decorating_ideas0z1ho.pdfIn PDF document text
    • http://lorenbayi.com/relexosotamalekibgwvg.pdfIn PDF document text
    • http://reduslimitaly-official.site/gulesewawoxug7lwut.pdfIn PDF document text
    • https://midodelawipage.weebly.com/uploads/1/3/4/5/134585137/loxigan.pdfIn PDF document text
    • https://biwopotalar.weebly.com/uploads/1/3/1/4/131438783/luxomoju.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/xunilukegez/26009325390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eee45ac-b2e8-4643-911d-084089c61b2e/84324854946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd7befac-7da8-48bf-ae78-a8b8c3595f0b/32095655041.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/how_to_find_the_supply_and_demand_functions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69cb4bcc-3033-4b60-8080-1462e6aa452d/how_do_i_setup_my_canon_mg2950_printer_to_print_wirelessly.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/1377635610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0daebe33-e60a-487a-ad52-6e319516ca20/how_do_you_adjust_a_square_d_well_pressure_switch.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_off0000e1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A9 5324 bytes
SHA-256: 34e78ec90665510f95199563938988cb482af082b9715f189ad144655ef640e2
font_01_sfnt_off0000f3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D6 10512 bytes
SHA-256: 3be81466c8da52e18e8e403c6e52881e92c1eb71ae5132712abf2b68969b7586

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