Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5f411fdc033659…

MALICIOUS

PDF

80.5 KB Created: 2021-03-08 14:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e319f451a43b1173fb970ca0f3d34fc SHA-1: 4f8a58ac624cbb6a69638c3a5f857525af83f238 SHA-256: fd5f411fdc033659e631fb3bb14cf71807912ab54eea42f7cbb8ea093afab1e3
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://mezovuduw.ru/123?utm_term=guidelines+for+breast+cancer+screening+with+mri PDF link annotation
    • http://fojukivijivik.medianewsonline.com/pazataxabebesanetavabapa.pdfIn PDF document text
    • http://wabiferofuvud.mygamesonline.org/burger_king_menu_2020_uk.pdfIn PDF document text
    • http://naturfresh.space/how_much_do_coffered_ceilings_costp5cev.pdfIn PDF document text
    • http://basagutidabe.sportsontheweb.net/chinese_calendar_2013_baby_gender_predictor.pdfIn PDF document text
    • http://izzzaaa.space/derokovurupative7a0dl.pdfIn PDF document text
    • http://4gusevshop.space/rafosukexaxob4e3c8.pdfIn PDF document text
    • http://firosujiw.iblogger.org/hotel_management_system_php_project_report.pdfIn PDF document text
    • http://zevixoleg.iblogger.org/nudubi.pdfIn PDF document text
    • http://vizojuzoninunoz.scienceontheweb.net/what_is_the_best_50_inch_4k_tv.pdfIn PDF document text
    • http://4gusevshop.space/dj_name_mixer_app_download_pc6ag2w.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/american_standard_furnace_freedom_90_single_stage.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/falagaketebexoveredizala.pdfIn PDF document text
    • http://doorstepcomputers.com/33165653054pyr3.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/42d8e418-bd76-4f9d-a565-64e85b30fd69/how_to_unmute_sennheiser_ew_100_g3_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c8f10e7-d4c9-43c8-9ee3-68903dbf179d/35685903186.pdfIn PDF document text
    • http://reluwiz.epizy.com/rukavapofejusurupu.pdfIn PDF document text
    • http://wepinipinalojud.epizy.com/woniliraguvov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2dc2fe1-de8e-4469-b2d7-204ce75bb9d0/java_software_structures_lewis_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/963829ef-686f-4ce3-8c3f-9ac3b2f22f79/how_to_keep_a_poorly_insulated_room_warm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18559c30-2edf-49e6-8959-65908fe13031/25299923656.pdfIn PDF document text
    • http://femejuzi.epizy.com/debentures_balance_sheet_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56439b87-68af-4e18-af82-61e33797cd39/66594401184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f26ebb6e-7566-407b-962e-02685b1f089d/fsx_scenery_config_editor.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_off0000fb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB94 5700 bytes
SHA-256: f108accb0c67c299ec8804a6f2520e8c1a2396d1d6fdd1fabef31b4be1cc6586
font_01_sfnt_off00010ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE1 10840 bytes
SHA-256: 98598da514a38ccc53ecfd8606af7635759f5ffb8d4c6894c5826ea924603d32

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