Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca898e8cec8c3672…

MALICIOUS

PDF

79.4 KB Created: 2021-03-23 10:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 397f1137541f164d0c12019c17f9f355 SHA-1: 9dc3aeea1fae50254a7a72d4ec0b64dc03c62421 SHA-256: ca898e8cec8c3672b000ddf73317beff1dd6eed3ba5ce7ec365631d5d2b80a59
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 0.9992

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://fokemale.ru/strik?utm_term=sigma+1009+turn+off PDF link annotation
    • https://cdn.sqhk.co/jaxogubajo/ONib8VI/gelato_vs._ice_cream_vs._frozen_yogurt_nutrition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493549/normal_602767f5db0c1.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/gWieVgd/beach_buggy_racing_games_to_play.pdfIn PDF document text
    • http://chambrehub.xyz/59729181081pmgmp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469827/normal_601ec1d88e51b.pdfIn PDF document text
    • http://makamar.xyz/550978953699mo63.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/fSqPCic/24456531506.pdfIn PDF document text
    • https://cdn.sqhk.co/pozipulavat/jdhgjhc/2019_general_knowledge_questions_answers.pdfIn PDF document text
    • http://keepxufi.space/lenovo_g50-80_drivers_windows_7_64_bit4c9m1.pdfIn PDF document text
    • https://cdn.sqhk.co/tujuvemevo/7y6hgJB/cake_decorator_job_duties.pdfIn PDF document text
    • http://bobr.space/quickbooks_desktop_sales_order_report3e795.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/66ff8d5a-580d-48f8-b8b1-de90b1c60bfe/funarilole.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/magnetism_worksheet_third_grade.pdfIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_e5e05a71954b4e86b5348b93e14137da.pdf?index=trueIn PDF document text
    • https://2863666b-9d79-467d-9aad-9eeb6dafbdf2.filesusr.com/ugd/6ee3eb_20b0a5b2311e406cb252b6156ac7e262.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa7e363e-607d-4ed9-a7fb-ea0c99942b4e/xin_vang_song.pdfIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_a3818c1f39fc4eec8cd679093387a1e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/why_is_my_sling_app_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07da59cb-da63-4f8d-ac65-89c35c223e0f/22458724197.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/senagabuxeboxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f3da7c-aedc-4e4c-b3d5-401913c96e67/el_dador_de_recuerdos_2_pelicula_completa_en_espaol_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2b9f945-b742-4e46-a871-5d9204aed4d3/coby_mp620-4g_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/phonics_worksheets_printable_kindergarten.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_off0000f7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D2 5332 bytes
SHA-256: b765988eff7357e88525af1bd1ab5968ac1f8a5ba8da5eba2ebbe39890eefb65
font_01_sfnt_off000109e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E3 11372 bytes
SHA-256: a9caf24c814d290c052ce07b989cba037d9638957468a305b45a4d477dfb296e

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