Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e72c8f870f1772…

MALICIOUS

PDF

73.7 KB Created: 2021-03-29 18:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c369abcd31d95f706aa92b130baffecd SHA-1: 6f61732d3962102d5407de9d0b64818e34db1da9 SHA-256: d8e72c8f870f1772bcc907cd27efc60c52e6b8c2719334b72274cd7c54859fa6
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains or suspicious-looking paths. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=flower+diagram+worksheet PDF link annotation
    • http://mebevevi.mywebcommunity.org/trn_c_tho__nng.pdfIn PDF document text
    • http://nutusugeralinet.mypressonline.com/the_fantastic_four_full_movie_in_hindi_dubbed_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/hcVrsij/hypixel_skyblock_superior_lost_adventurer.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/how_to_reset_prius_maintenance.pdfIn PDF document text
    • http://bewilotaweje.mywebcommunity.org/sql_learning_book.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/njfsUig/chat_rooms_for_free.pdfIn PDF document text
    • http://fesabip.iblogger.org/bujonixifufudebutizewi.pdfIn PDF document text
    • http://kidupat.getenjoyment.net/malivorerugop.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/hpbhcdp/mario_kart_tour_multiplayer.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/TnW4BKU/poniwej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b6fdd0e-462a-4856-a342-6ce769336fbf/kubota_diesel_engine_spare_parts.pdfIn PDF document text
    • http://vinakipel.rf.gd/el_aprendiz_de_brujo_2_libro_gratis.pdfIn PDF document text
    • http://riramemixezu.epizy.com/17706888772.pdfIn PDF document text
    • http://lagamifex.epizy.com/armored_warfare_assault_tanks_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee6cff9-5df0-4ed8-a440-e8f5c5aefad0/combining_like_terms_worksheet_6th_grade_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bbd4379-0ab4-4c96-8107-6a43e1e4f080/xatupesakebiso.pdfIn PDF document text
    • http://tezebidurob.epizy.com/apache_solr_for_ubuntu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e51179-671e-4fdb-8c6e-b182ceee7add/84928430087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2e398cd-287d-4906-b968-26a83f99d915/16328015246.pdfIn PDF document text
    • http://zasasopatadinu.epizy.com/clothing_inventory_sheet_sample.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB2 5352 bytes
SHA-256: 5f461f116939c320d70aad4c309eb30639b9f4970d855d8ea5039e7b36e4571d
font_01_sfnt_off0000decd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECD 9576 bytes
SHA-256: f3e09f2f847fcac57a27fcc9f5d6a208158f8ff343029e1c776b5dfbbfed1fce
font_02_sfnt_off0000ffbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBF 17524 bytes
SHA-256: 4cdae610a665dbfcf1ba8031a590d3c671447e39be658556c04aab87c5e7f59a

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