Malicious PDF — malware analysis report

Static analysis result for SHA-256 433084985c18048c…

MALICIOUS

PDF

89.1 KB Created: 2021-03-21 21:59:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 395700b610821722ea21eb29979ea360 SHA-1: b091587483ce98b6d62057756b3703604e9fd1b1 SHA-256: 433084985c18048c6fdd961a99bc0397f325f3c31b4b8a1eca9acdb6bb58711e
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 0.9961

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://jumiwimov.ru/award?keyword=cambio+climatico+lo+que+esta+en+juego+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459937/normal_5fe597b114335.pdfIn PDF document text
    • http://kinorio5.xyz/76713648999sehw5.pdfIn PDF document text
    • http://youtube-subscribes.com/goat_simulator_payday_trophy_guide_mobilem68be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_6011f77b6452a.pdfIn PDF document text
    • http://dezobewasovof.iblogger.org/coraline_movie_script.pdfIn PDF document text
    • http://uscarinsurance.info/wabupalerdvoj.pdfIn PDF document text
    • http://instapriz.website/98524132469efqmn.pdfIn PDF document text
    • http://firavowinoza.iblogger.org/meal_calendar_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470040/normal_6053246e7e57b.pdfIn PDF document text
    • http://localdesign.me/what_are_the_types_of_phonological_processesanftm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443292/normal_603aa4cd568d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://woxowezev.rf.gd/13458391663.pdfIn PDF document text
    • http://mesipupip.rf.gd/78920819226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f6a3aa-5b70-4c60-ba85-bbce738e9231/xelabelakivojirodus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82057502-a103-4126-9e8a-ba79974f81d4/imusa_pressure_cooker_instructions.pdfIn PDF document text
    • http://kibototudezusob.epizy.com/archeology_essentials_4th_edition.pdfIn PDF document text
    • http://mubufelijora.epizy.com/worido.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_e738a314ad884451bdaddff0ffc0420d.pdf?index=trueIn PDF document text
    • http://sekizipax.rf.gd/krezip_sweet_goodbyes_sheet_music_piano.pdfIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_71642ed7d8a6474ca19f4784886f7031.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_e83f5bf485c846698fe86360a9a7aa14.pdf?index=trueIn PDF document text
    • http://kubalomarupageb.epizy.com/9250440358.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_fb49f1501cc440d9a79deca0533b137e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ed68017-ffa8-489c-9000-54f3b7e50956/maximum_ride_age_appropriate.pdfIn PDF document text
    • http://winuzuvejifod.epizy.com/ielts_general_listening_test_with_answers_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c54c434-67de-4f6c-bd15-8899bb6599e4/proto_rail_paintball_gun_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a057e627-097b-460c-809c-82034113245e/samsung_rf263beaesr_ice_maker_stopped_working.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_off0001190f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190F 5624 bytes
SHA-256: b1214c0963c78dc10ff574b42362300bdec42963352ed4db6a455b4479a57286
font_01_sfnt_off00012c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C17 12472 bytes
SHA-256: 67704d4a41008d02d8616f581ef213f310bf911fb60a4f6e31e97e11558262cb

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