Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad8ab7de9064f0a…

MALICIOUS

PDF

68.1 KB Created: 2021-04-02 06:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 196bcb8d453b4950239f7588a6dae157 SHA-1: baa33410612a845a19e7cec64415b0c6162a38ba SHA-256: 2ad8ab7de9064f0a193e176aec4638565a3288b98fc81acb4d6b1f8618058f0e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9402

Heuristics 4

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://pelibifir.ru/award?keyword=adjectives+plus+prepositions+pdf PDF link annotation
    • https://cdn.sqhk.co/jexerigix/Bk5TihI/stock_trading_simulation_software_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sadisadaz/icK3eJu/clavinova_digital_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/bgedMgi/business_card_scanner_app_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/nafolekuge/VQgifZ2/gallery_furniture_houston_lift_chair.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/5je6wW7/vobobujovuxojimomupar.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/tuzakifezara/lonajizelotik.pdfIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_f5a928c9d2034e23904b649ebe6e2023.pdf?index=trueIn PDF document text
    • http://divifafapinuk.rf.gd/65994218144.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/astoria_espresso_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/kuzivopakusukivorujofewi.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/mathswatch_worksheets_ebook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/graco_snugride_click_connect_30_35_lx_base.pdfIn PDF document text
    • http://zibozepor.rf.gd/asu_mapp_computer_science.pdfIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_281fce15d7b74daa8a4fe19f32cdf292.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/51680182648.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/grammar_test_multiple_choice_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a6897c6-9140-4807-847d-466d10c1be3f/43949926236.pdfIn PDF document text
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_7c47daa1a650407caf80910e5d91379e.pdf?index=trueIn PDF document text
    • http://patelaforal.epizy.com/do_navy_seals_have_mos.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/nanezipekinibuwutenizer.pdfIn PDF document text
    • https://77ac2d45-d533-4b4b-a85c-01e81860bff9.filesusr.com/ugd/7f1ad7_c9df36885bf14a3e81ab86054be10079.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e5092e2-cc31-49dd-9e88-1d41e602701a/needful_things_store.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/ketexeminimudupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4be57c8-3cbf-4bb0-a2cb-aa27560d1f68/kixisamu.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/can_i_use_my_sim_card_in_a_mifi.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE3 5064 bytes
SHA-256: bb38e56d371977e374bd17d56ff038f0b64fed531eb92910dc287da8434b76f2

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