Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79909a378d9d156…

MALICIOUS

PDF

79.2 KB Created: 2021-04-05 01:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 81d18a27c12d233d7aaafdd917e75258 SHA-1: cf5b471c102a74bf7987af1d7eaba651258a4581 SHA-256: d79909a378d9d1562349951db7e2c39f9156d3f73054f308b26d48522d5f0252
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The embedded URL suggests a phishing lure, disguised as a business report. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to redirect users or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=business+report+sample+pdf PDF link annotation
    • https://cdn.sqhk.co/gowamojon/Jw63jiP/assamese_new_song_site.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_606a3be626019.pdfIn PDF document text
    • https://cdn.sqhk.co/nazabimon/TsccjwA/muliwawamemovidofup.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/hFcgdge/cool_pumpkins_carving_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabumumiw/ziggiM0/23570656723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_604010c0379fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403672/normal_605214ec461ba.pdfIn PDF document text
    • https://cdn.sqhk.co/zanaforare/1TeTge6/rank_one_forms_yisd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495855/normal_5fddd5c974453.pdfIn PDF document text
    • https://cdn.sqhk.co/wevujawej/cvhaSjf/windows_server_2016_licensing_guide_vmware.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ketanuviz.epizy.com/how_to_add_legacy_forms_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/analise_informatica_notebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25b483c2-5b36-4337-9f32-7588ce951c72/what_is_your_deepest_fear_quote_coach_carter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5574648b-9dae-4e79-b02b-dd09911fa2f8/how_to_move_dish_network_service.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/albion_online_all_platforms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368a8e89-56ea-419f-835b-9f81ad924409/blacked_out_through_whitewash_by_suzar.pdfIn PDF document text
    • http://riluromeni.epizy.com/cabrio_steam_dryer_heating_element.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7838ce7f-f53f-47e8-b530-340408ba604e/best_70_pint_dehumidifiers_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/38689348983.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/77281687281.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_off0000f95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95D 5236 bytes
SHA-256: b73d953ad52a59f267e930ca95b935b4d435f0e72c3fcb548923297fe3053491
font_01_sfnt_off00010b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B14 10740 bytes
SHA-256: 1d7ba80be13e42558b3f26138eef49573d067d315723962a70cf7928a4ae8e1e

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