Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0dc329b964ed4c…

MALICIOUS

PDF

73.1 KB Created: 2021-03-11 15:29:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a27b394645f84d3ea82325212a02ab9a SHA-1: 3444d2e6f0a61ae0b7edcea0084912ac776181fd SHA-256: bf0dc329b964ed4ce394c7c468b99a04e26069ebb2e580d420d95cf32f281ac8
104 Risk Score

Malware Insights

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

The file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI and a visual download button suggests a phishing or social engineering attack aimed at tricking the user into downloading a payload. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/123?utm_term=hiragana+handwriting+practice+sheet
    • https://cdn.sqhk.co/dutudovajud/wNa7jhe/video_editor_salary_us.pdf
    • https://sekitajed.weebly.com/uploads/1/3/1/3/131383533/7374808.pdf
    • http://falilufip.iblogger.org/gubisifobimorewas.pdf
    • http://duwinijuj.mypressonline.com/scholastic_success_with_grammar_grade_5_verb_tenses.pdf
    • https://kewenarizifosiz.weebly.com/uploads/1/3/6/0/136092989/5429268.pdf
    • https://cdn.sqhk.co/ralapogifur/hb9ODjh/alvida_ramzan_naat_status.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dupizorof.rf.gd/d_d_character_sheet_randomizer.pdf
    • https://s3.amazonaws.com/zufaxepixiguxax/big_fish_games_manager_installieren.pdf
    • http://xiluwudikipo.epizy.com/house_budget_spreadsheet_uk.pdf
    • https://s3.amazonaws.com/rujabepifar/partial_differential_equations_for_scientists_and_engineers.pdf
    • http://seroroxunabolu.onlinewebshop.net/95411837049.pdf
    • http://jemileti.atwebpages.com/meiosis_worksheet_answers.pdf
    • http://velewetuwo.rf.gd/radufimusabatedudirewono.pdf
    • https://s3.amazonaws.com/nisoxow/84442102927.pdf
    • https://s3.amazonaws.com/gekojulog/proprietary_company_constitution_template.pdf
    • http://mudivufovibu.epizy.com/48258468027.pdf
    • https://s3.amazonaws.com/belapawerezuju/52211106717.pdf
    • https://s3.amazonaws.com/rikolesafuwofar/costos_de_calidad_clasificacion.pdf
    • https://s3.amazonaws.com/tinivukedeta/7212134312.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3d8.bin
5c8b027fe9180bfc6fdc2f5907cfd3687d80b752382b34d893750c9937f3db54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D8 3220 bytes
font_01_sfnt_off0000df53.bin
a8046c9208eef282dfb6a2772e2a1a8fd1440393ed7055fc377c0453c924912f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF53 5356 bytes
font_02_sfnt_off0000f192.bin
29d942b89737fecf4b773542c3108e95484efec298458395eed06ff176b8046f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF192 10328 bytes

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