Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff721f89a69ca0b3…

MALICIOUS

PDF

76.1 KB Created: 2021-03-01 17:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8b63552cc4b4663e1d391490012211d4 SHA-1: 4b6f9221a1ab898dc812960bd36f39d2fd27f80d SHA-256: ff721f89a69ca0b3121e860baf9238619fd00d0df3b4f23199e75fb288ab4385
104 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The presence of a 'download button' heuristic further suggests a malicious intent to trick the user into downloading a payload. While no scripts were explicitly extracted, the PDF structure and the external URI indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://zajinet.ru/strik?utm_term=adobe+premiere+pro+cc+color+presets+free+download PDF link annotation
    • https://cdn.sqhk.co/gidulikegel/jcgdjiQ/79716994660.pdfIn PDF document text
    • https://falugasotemo.weebly.com/uploads/1/3/1/4/131410545/f7b60390a.pdfIn PDF document text
    • https://cdn.sqhk.co/netimupoxojo/wfheCii/91871761770.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489834/normal_6001392b783ff.pdfIn PDF document text
    • http://wigomufeze.22web.org/kingdom_hearts_1._5_atlantica_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/wefegiwezon/xJCihij/tujefaxavo.pdfIn PDF document text
    • https://gozaxuvo.weebly.com/uploads/1/3/4/6/134612917/manutofum.pdfIn PDF document text
    • http://trendmobile.ru/how_many_carbs_in_dunkin_donuts_bagel_bitesx63fj.pdfIn PDF document text
    • http://pusedoropeseb.66ghz.com/fimitowon.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/baxekojojexusol/balanza_de_pagos_bcrp.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/referencias_bibliograficas_formato_apa_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/top_rated_life_insurance_companies_consumer_reports.pdfIn PDF document text
    • http://vudatuvabejosix.epizy.com/browser_android_ringan_dan_hemat.pdfIn PDF document text
    • http://fasevebozumip.rf.gd/2019_election_results_south_africa.pdfIn PDF document text
    • http://vebodowumiba.epizy.com/zobigovipoxokog.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/ellis_island_interactive_tour_worksheet_answers.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_off0000ea8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8F 5520 bytes
SHA-256: d4da228f89c05fa0c75617244c59724e31a1bb7275e3fdb856657553f009716f
font_01_sfnt_off0000fd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4B 11016 bytes
SHA-256: 4b452aaad522ddbd7f4268cd74dd4e1bcccb969c5b5015eede588fda0ba644f9

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