Malicious PDF — malware analysis report

Static analysis result for SHA-256 669cdd95fba77451…

MALICIOUS

PDF

77.0 KB Created: 2021-04-15 06:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 933328200ad4ff074594f90c04262ecf SHA-1: 75e3cb4e61844d05cd0786b73024dede04271cd6 SHA-256: 669cdd95fba77451e94c6a071cb90bd8e7dff9af8c263ba0f8c5985d3d700fa4
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 0.9991

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://soxebez.ru/strik?utm_term=scott+joplin+the+entertainer+piano+sheet+music PDF link annotation
    • http://gupiduwexe.22web.org/vosoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499995/normal_5fd8846f5d2ea.pdfIn PDF document text
    • http://universal-kirov.ru/run_r_code_in_python_rpy26y7xs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415061/normal_60524b68e583c.pdfIn PDF document text
    • http://usacreditreport.info/gypsy_moth_caterpillar_life_cycleepp0w.pdfIn PDF document text
    • http://copyrightnotice-ig.com/download_football_manager_classic_2015_androidpkjgr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370073/normal_6007f3309acc6.pdfIn PDF document text
    • http://indital.space/ssr_125_engine_for_salep6v84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://debarunuzijabe.rf.gd/anker_ipad_keyboard_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c6abcc-03f4-4dec-8d4c-a93f1263f8cd/como_se_dice_estudio_del_trabajo_en_ingles_traductor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a0329cd-3360-45aa-b491-ebe3ce8f4d78/80853530191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbf853b-a5b4-43f0-b9d0-064a65577d70/bissell_proheat_multi_surface_2x_wont_spray.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/wuwibenuji.pdfIn PDF document text
    • http://kisoperut.rf.gd/do_therapists_read_body_language.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/25653195380.pdfIn PDF document text
    • http://bibekuxamawijoz.epizy.com/sbi_blue_chip_fund_growth_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6fbc80-f553-498a-baca-66f70f7d89e8/refejuvugebesitinaderiton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3661c74f-cd29-49fc-9f29-addf550ceaac/democracy_and_education_john_dewey_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb34e4c5-b6d4-4b8a-90f3-3f4eb6821352/47420224556.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/anthem_federal_blue_cross_prior_authorization_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/fundsmith_global_equity_factsheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c1ea504-c111-4552-b7c6-0da2d3565aed/the_secret_history_of_the_mossad_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7518a3b8-04f7-4176-9c24-d7050296b315/6060174677.pdfIn PDF document text
    • http://gofokamerutasi.rf.gd/99653975649.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_off0000ee28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE28 5352 bytes
SHA-256: 4d0b65e6fd06968515556898b82fdfed76a3fc060a426a4b98e437071899ec8b
font_01_sfnt_off00010032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 11132 bytes
SHA-256: 14d22e24a53cc114cb68085293c293c328057730eb34a220015de6068f6f7270

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