Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c644cdaf7146ff…

MALICIOUS

PDF

78.0 KB Created: 2021-03-29 07:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6e10ff1a25cd5ce06d908d66611a3c57 SHA-1: 213c7c65d6fd85e0298f77dbf47837ba0f2df1f9 SHA-256: d2c644cdaf7146ffec82d68cb71ff0eeaf8d27a0062f950c86646645020c28f6
126 Risk Score

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 0.9964

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://baarspo.ru/wix?keyword=dirty+french+book+pdf PDF link annotation
    • http://xuvavarapegu.mywebcommunity.org/autocratic_leadership_journal.pdfIn PDF document text
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/tekiruguxo_tiluruwukinif_xaziwujixufukuk.pdfIn PDF document text
    • http://trynutra.shop/istqb_advanced_test_manager_exam_questions_answers4pvsi.pdfIn PDF document text
    • https://pejapuvurexoku.weebly.com/uploads/1/3/1/6/131636728/dezubisaz.pdfIn PDF document text
    • https://funebaxap.weebly.com/uploads/1/3/4/3/134399245/9520893.pdfIn PDF document text
    • http://service-hire.com/baroque_guitar_plansmya47.pdfIn PDF document text
    • https://toromadon.weebly.com/uploads/1/3/4/5/134523466/c2136faa.pdfIn PDF document text
    • http://ninuxalezopo.getenjoyment.net/nse_bse_holidays_2020.pdfIn PDF document text
    • http://kunozoxutokusu.mygamesonline.org/zeguk.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/how_to_download_apps_on_ios_without_apple_id.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/jumozorofivuropoxepike.pdfIn PDF document text
    • https://nilesezijifata.weebly.com/uploads/1/3/4/8/134885493/vigenem.pdfIn PDF document text
    • http://cparta.moscow/42124513308tp3oy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xomutojekes.myartsonline.com/shanti_narayan_differential_calculus_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad73b06-5525-44b5-bcc0-346b2eb7fbee/how_to_do_weight_training_at_home_without_weights.pdfIn PDF document text
    • http://woranuganavot.myartsonline.com/pafotenene.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/kefiroluwivudek.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/luboba.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/analysis_of_multivariate_survival_data_hougaard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21498d0d-0442-467c-9727-c2dae0e9f209/thirteen_reasons_why_season_3_episode_5_cast.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/38149979583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f927235-1c9a-4571-9c19-1f0fbaeebadb/7071133936.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/tisaniwuselot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d866306-d300-44c8-b906-6276aac1d9c8/star_wars_trivia_questions_and_answers_multiple_choice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c4b899-b06a-45b7-a40e-41e50fd78027/51106704193.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_off0000eaee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEE 5128 bytes
SHA-256: bdde8ef71df211daa55f1217fe71a1e0b0526178eaa186527242f4869d91562f
font_01_sfnt_off0000fc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC68 14368 bytes
SHA-256: 7ca0fbff9e9107b732b7790ab4f8b0a6335bc86a95df51e5669ba473e170f6d1