Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66ce93d76b22309…

MALICIOUS

PDF

78.6 KB Created: 2021-03-26 04:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3c7e8b45f0c370499f32b0db18e24dc3 SHA-1: ab73b89636607989f611985598d458069b1d77e2 SHA-256: e66ce93d76b2230956ea02a44b8f33b6aeab194841d9e5036d71a6acbf3142d6
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 0.9997

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://midufefew.ru/wix?keyword=kenmore+intuition+vacuum+manual PDF link annotation
    • http://takilajonireko.22web.org/how_to_fix_black_screen_with_cursor_on_laptop.pdfIn PDF document text
    • http://bosajefidil.iblogger.org/trusting_god_jerry_bridges_study_guide.pdfIn PDF document text
    • http://kudatikixobulan.22web.org/local_guide_level_7_perks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427538/normal_603cf81a5e686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5fd5f92edfaf0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_f75f8800f0ce45b6833e6b5c34da8474.pdf?index=trueIn PDF document text
    • http://xadujagi.epizy.com/best_mmo_combo_game_dev_tycoon.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/pakistan_army_song_audio.pdfIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_4be33ce8a64e4f1e93203a8b26bfcb48.pdf?index=trueIn PDF document text
    • http://jigotubefaso.rf.gd/aggregate_water_absorption_test.pdfIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_2ece233c66a34fcc8417e6b717675119.pdf?index=trueIn PDF document text
    • http://nukuxora.epizy.com/how_to_install_oot_randomizer.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/air_raid_siren_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/doncaster_free_press_court_report_today.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/gajemavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d99d7353-c168-4d0b-bbbf-6df47bc12894/udacity_data_analyst_course_free.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/who_owns_firex_smoke_detectors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc5e45f-9d91-4dbc-983e-4b3919a6ba0b/que_niveles_abarca_la_educacion_media_superior.pdfIn PDF document text
    • http://sixanuramusasit.epizy.com/50_shades_of_grey_movie_sequence.pdfIn PDF document text
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_34dd60dcf39c4066963619ba7a7163f7.pdf?index=trueIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_4e401b202a46427eb3d01d1f629dca20.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f55b2066-f4fc-49c1-a8dc-57d8a3e2f236/kipajikasox.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_off0000f4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F2 4796 bytes
SHA-256: 7157c3729dd1a1f24044e97544b3b721e3407cc96f9a65018eb14a5e071932a9
font_01_sfnt_off00010534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10534 11752 bytes
SHA-256: 9ec28369473bba27a32370136d77fe9cc0bce689361971f6a83af7af4483f06f

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