Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c33ea3e19563777…

MALICIOUS

PDF

75.2 KB Created: 2021-03-13 20:22:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3664eddba0b3a1706737eb62a8c3be7c SHA-1: 1a757087845a633b4c7bce94c60763436bdf8fb7 SHA-256: 8c33ea3e19563777e5676882e0d5883583ff4735945cf3eca68aab9e4dfe0470
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/award?keyword=obudu+cattle+ranch+pdf PDF link annotation
    • http://floradoma.net/fivetimoxopk9et.pdfIn PDF document text
    • http://copyrightsupport-ig.com/short_moral_stories_in_english_lyricsb0b1w.pdfIn PDF document text
    • https://tizijepen.weebly.com/uploads/1/3/4/2/134234944/dubalixure.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/wupubeliguj.pdfIn PDF document text
    • https://gubizelejipeter.weebly.com/uploads/1/3/4/1/134131403/meber_varidoj_nasuzutufese.pdfIn PDF document text
    • https://fojumotapikapig.weebly.com/uploads/1/3/4/3/134372119/ca5e874617d169.pdfIn PDF document text
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/kerogulewezirujekav.pdfIn PDF document text
    • https://wovorixikamaso.weebly.com/uploads/1/3/1/3/131378932/503a905004f.pdfIn PDF document text
    • https://kodabovoxalomas.weebly.com/uploads/1/3/5/3/135340354/nugemuvosu.pdfIn PDF document text
    • http://rubeatyshop.xyz/how_do_i_reset_my_polk_audio_soundbarlvxug.pdfIn PDF document text
    • http://blancop.xyz/how_to_record_a_sale_of_a_fixed_asset_in_quickbooks01fo9.pdfIn PDF document text
    • http://inscarusa.info/kipunekorwaonz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/sheet_metal_forming_machinery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/243aaaa0-9d5f-4cd0-b31d-49e9ed83fa18/memento_mori_history_definition.pdfIn PDF document text
    • http://muvekalufisu.atwebpages.com/rival_electric_food_slicer_model_1030v_4.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/how_to_use_android_tv_box_remote_control.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/noxikewuzuwumobafatazejus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41a36ead-a522-4f85-a2a2-b3c7b0e3a9cf/how_to_file_simple_tax_return_for_stimulus_check.pdfIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/lugetupiwomifo.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/8343551408.pdfIn PDF document text
    • http://bagugexasorip.myartsonline.com/fevatila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a3be802-45d3-47f3-bd6c-13d5f79e3d91/spanish_to_english_dictionary_book.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_off0000e81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81F 5232 bytes
SHA-256: 05917ace531d1d663e4ddbc475646e97da889095a1af36663506321e608167b3
font_01_sfnt_off0000f9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DA 11492 bytes
SHA-256: 23812341c59abd18ef759258cd137c01498915431862f5b4ae7d610fc10a8a31

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