Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ecd22bd0ce77fb…

MALICIOUS

PDF

74.0 KB Created: 2021-03-11 21:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b2abc52fdd009bbc58d5a8e98e5af0ae SHA-1: ec74a1edd12f2658d9d5ea2d5e3af10991e4ad6d SHA-256: f9ecd22bd0ce77fb5348c30c6746ee4d01de5313037b454f7d2f47ce91f6a304
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

This PDF document employs a social engineering lure, instructing the user to install a browser extension or update to view content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it may leverage JavaScript for malicious actions, potentially leading to credential theft or malware installation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://bologen.ru/123?utm_term=kaibab+deer+worksheet PDF link annotation
    • https://cdn.sqhk.co/wutakuvi/UgchilQ/tintura_de_barbatimo.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/hRieC3T/43281679204.pdfIn PDF document text
    • http://erogan-oficial.site/how_to_get_cell_reference_in_excel_vbas75dh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413242/normal_5fe38f6720c32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412588/normal_60353ed61a2c7.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/gBgdsd6/29986925050.pdfIn PDF document text
    • http://dazesejep.iblogger.org/how_to_communicate_effectively_in_the_workplace_ppt.pdfIn PDF document text
    • http://mibamixuxonewu.22web.org/simixojekofa.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/jhfKF3a/riwozojajimijinam.pdfIn PDF document text
    • http://dasonudulikuvon.22web.org/what_does_the_upci_believe.pdfIn PDF document text
    • http://grigolia-studio.ru/61537082243uf9zg.pdfIn PDF document text
    • http://febafavawi.iblogger.org/best_push_pull_legs_workout_bodybuilding.com.pdfIn PDF document text
    • http://fineagencyy.com/nadazunadaxa7bo9.pdfIn PDF document text
    • http://daating19.site/11503703808fcjjn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494429/normal_5fec4e5f7d18c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juropap.rf.gd/dcuo_switch_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c813b9-2a76-4c91-9e50-ed96dbc7240d/how_to_analyze_categorical_data_in_python.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78ca361-9014-4002-859f-d892ae8f70d2/jixatisemubazexi.pdfIn PDF document text
    • http://gadexasumale.epizy.com/4_column_ledger_template_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/010c085b-ffc3-4e07-9849-e09a3105818c/how_much_does_the_wonder_weeks_app_cost.pdfIn PDF document text
    • http://patupafu.rf.gd/b_pharmacy_syllabus_2nd_year.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5a174c8-d044-4751-b64f-c76cc3fc1f0e/rivufaragog.pdfIn PDF document text
    • http://latajixow.epizy.com/what_does_it_mean_to_be_called_and_chosen_by_god.pdfIn PDF document text
    • http://ziboporo.epizy.com/how_do_you_know_when_your_newborn_is_done_breastfeeding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec81c50c-fe67-4147-94e9-aa46323d301b/reading_comprehension_passages_with_questions_and_answers_grade_2.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_off0000e3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E0 5148 bytes
SHA-256: c845a13086e020ff20fe2fbe2d733b3719874e1ea82adaac7b971a9093f5245a
font_01_sfnt_off0000f56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56A 11096 bytes
SHA-256: c37091f045ad201f2680d9591f29dc621fdfba59d06a305866f4d03a38cd4c0d