Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e98ef5275d38291…

MALICIOUS

PDF

76.4 KB Created: 2021-03-18 16:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 03a35c53e6f375aafa5d2271380c0873 SHA-1: 44ee2cb279ad48045a2bf8a809449b3e46240006 SHA-256: 7e98ef5275d382911d08115fe8d5907f6ba94e1e8e0222fb955fe2744a3994af
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs, including one pointing to 'botokaw.ru' with a query parameter suggesting a worksheet. Another heuristic identifies it as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery via the embedded links.

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://botokaw.ru/123?utm_term=nuclear+fission+and+fusion+worksheet+pogil+answers PDF link annotation
    • http://mefizilexofe.66ghz.com/bluetooth_photo_printer_for_android_phone.pdfIn PDF document text
    • http://tuwimig.scienceontheweb.net/bondarchuk_periodization.pdfIn PDF document text
    • http://udilische.club/benakadobuberujermpr9.pdfIn PDF document text
    • http://lufosopaxukil.getenjoyment.net/xinezibizilimilamobekon.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/surefigebofivijedil.pdfIn PDF document text
    • http://myfavoritesun.xyz/1044786673f2b7t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_3fb4324c520b4bde9c95fd502fe17663.pdf?index=trueIn PDF document text
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_fd27f55801cb4844910f7d63d7897702.pdf?index=trueIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_46f47fa248d746fd83810d9b34d9d663.pdf?index=trueIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_1cb5cc5c20634df5b3a226dd9bec6740.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dojonuta/zasazagenisuxisobakebijok.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/adobe_flash_player_free_softonic.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/jk_bank_calendar_2020_file_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a97aac5-0209-4bae-b8a8-1b9c17f0a8e7/saffire_pro_40_catalina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/863d26b3-f55b-46af-8f3a-ac0969ec07f6/7535207429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb329be-51b4-4ba5-9dff-e259defac0e4/26352646693.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/what_type_of_oil_does_a_chevy_traverse_use.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/92707296016.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/pebuvojitiferabawem.pdfIn PDF document text
    • http://mejefelutirarej.epizy.com/l_movie_song_free.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_off0000eb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB38 5544 bytes
SHA-256: 7ceb9996928e7045960f5dcec31cc12b6a5cd32c8a3bb16f4af566f92e752a20
font_01_sfnt_off0000fe2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2D 11416 bytes
SHA-256: 97e4b47e0f4c76991c292d06892602e91c329d4911639f85ab07f0dbcdf8be13

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