Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f27e01664afcaa…

MALICIOUS

PDF

84.5 KB Created: 2021-03-22 14:25:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5d3bbb8bed9aa53a8043378a6a004741 SHA-1: 17f689e05fadc7a8f2656f5f3cca60cc76fb8a60 SHA-256: d9f27e01664afcaa4014089b8725933bc390c666ec41b1aefb92b67b31e6ff1d
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 0.9994

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://lozipotod.ru/wix?keyword=directions+to+central+high+school PDF link annotation
    • http://soul-felt.com/how_to_prepare_for_dentistrypgnv8.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/ghd7Yji/gonomuziz.pdfIn PDF document text
    • http://ridunculus.com/excel_formula_multiply_multiple_cellssacwj.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/pAOtgh3/hungry_shark_world_map_pacific_islands.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/izi9hfR/nstemi_guidelines_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/cijMLj3/game_center_ios_apk_android.pdfIn PDF document text
    • http://abanca-electronica.com/mimezajejefigakanubawojurko5s4.pdfIn PDF document text
    • http://copyrightproblem.com/67562027527cri1e.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/dEPCMBO/98523492341.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/0ziargc/war_of_the_west_2019_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/pasededi/6hKgf1r/gamers_wallpaper_cell_phone.pdfIn PDF document text
    • http://euromarket.pro/how_to_clean_with_bissell_proheata1hgo.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxarabo/gffhLWz/arena_theatre_arts_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/951c831f-f18e-4b7a-bd92-b116cf96bc07/96739980980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c633cb-ec0c-4f48-bd05-d57683ccedae/head_3d_model_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d3fabe-09c2-4e9b-90bb-2a4ec21e1fb3/gajivuxokijisa.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/kikikuti.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/jeevan_shanti_850.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/aadhar_card_form_maharashtra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b88aae5-e581-4d9c-9a3f-99e255d29c67/trials_of_apollo_book_3_audiobook_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4048a98b-7d98-4724-8709-282d8509fc1c/samsung_dv210aew_xaa_not_starting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd253fa-ff94-4839-b645-94fe7e1b97a9/harbor_breeze_merrimack.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/rogikef.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_off00010cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB0 5060 bytes
SHA-256: 227fcbca15d343f55d1400f04b85d1b687ae5569ca655e91125c2d9a8e8d6ecc
font_01_sfnt_off00011de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE2 11420 bytes
SHA-256: c1f77868d474e8c769b821628b8d320da3c726b225917a11cd24e3b0a1075fa6

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