Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9cf54b6bc157aec…

MALICIOUS

PDF

78.5 KB Created: 2021-03-14 09:17:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b5434331c06781a169797eb7b25b4c3 SHA-1: d984de47b8a7a51a88a6834424f10c18d08a050e SHA-256: b9cf54b6bc157aecd01f24acb0a24d929e163dcf8e72301837449f7486264181
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users through social engineering, likely by masquerading as a legitimate document to trick them into visiting a malicious site.

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://druttle.ru/wix?keyword=harrison+township+library+vote
    • http://rawenspant.online/nagutexubabupidemoposubazgxouz.pdf
    • https://cdn.sqhk.co/winelolibug/6ggia6G/prehistoria_etapas_para_ninos.pdf
    • https://nipawivas.weebly.com/uploads/1/3/2/6/132680981/8c312d1c12b9a.pdf
    • http://nunopasatipimav.medianewsonline.com/28359461072.pdf
    • http://giwitijudaleka.mygamesonline.org/72158383049.pdf
    • https://gakafapokizi.weebly.com/uploads/1/3/5/3/135319358/moluvuxapefeguru.pdf
    • https://cdn.sqhk.co/mekaxosur/ThcUhiq/81102975908.pdf
    • http://momarivido.mypressonline.com/kipoxawarefewexile.pdf
    • http://lomigakorak.getenjoyment.net/ryobi_electric_leaf_blower_wont_stay_running.pdf
    • http://autokenn.com/915659161015lgv7.pdf
    • https://cdn.sqhk.co/vanewano/hepesDQ/vetumaziwepijowewave.pdf
    • https://tekovotobu.weebly.com/uploads/1/3/5/3/135319939/netenalepoxofe-kiwomodukap.pdf
    • http://uspeh.icu/dish_hopper_settings_menulhnop.pdf
    • http://fopekoriw.sportsontheweb.net/abigail_adams_letter_to_john_adams.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/metubevozisul/57114465582.pdf
    • http://xujided.onlinewebshop.net/rifts_rpg_books.pdf
    • https://s3.amazonaws.com/panalipolifod/simple_bootstrap_template_ecommerce.pdf
    • http://bagugexasorip.myartsonline.com/49724478408.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f524.bin
293f340d904eafe4d7a0062ddddd8c34b58e794a4407bcdfff9a1a6f8df207cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF524 5264 bytes
font_01_sfnt_off00010715.bin
c34b10e0bade27aa485e940b0c417b999f48a30ca271f0d91161a080d780c17b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10715 11124 bytes

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