Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f44837acf66845…

MALICIOUS

PDF

72.5 KB Created: 2021-03-19 00:09:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a8d5e069f1f31984f2a948b877917cb SHA-1: d4c15921a447dce206809cd7f3198a6c105c4277 SHA-256: e0f44837acf66845c4f6b05367696d2f11eda35b3af7eb941a57ecb2faf126ef
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'kuzutuzo.ru', which is likely part of the phishing infrastructure. Although no explicit script was extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, potentially for credential theft or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/wix?keyword=fox+creek+elementary+staff
    • https://cdn.sqhk.co/sowojusawepu/AVy8icK/12108599901.pdf
    • http://pivojapigalotu.22web.org/59821729729.pdf
    • http://sugebowupubixo.mypressonline.com/87655938415.pdf
    • https://cdn.sqhk.co/kigimole/7jb0Thg/al_kalam_surah_e_shams.pdf
    • http://guparob.mywebcommunity.org/crochet_patterns_for_scarf_simple.pdf
    • https://cdn.sqhk.co/xurilopotun/hgThhJo/sd_card_won_t_format_write_protected.pdf
    • http://prodive.su/esv_study_bible_amazon_uksklx3.pdf
    • http://jamotovoxut.mywebcommunity.org/37704211424.pdf
    • http://rozujed.sportsontheweb.net/juwofelefumulixum.pdf
    • http://tuzogat.sportsontheweb.net/kexekunumuwozaruba.pdf
    • http://ionatr.space/huckleberry_finn_audiobook_chapter_1805ei.pdf
    • https://cdn.sqhk.co/modonasuje/jcgi3hO/tavinefavowejevesilokimo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gawusozuf.epizy.com/pdf_to_word_document_conversion_free.pdf
    • https://s3.amazonaws.com/lakadutof/xivekaragobavazana.pdf
    • http://disidigepaxu.rf.gd/berichtsheft_ausbildung_vorlage.pdf
    • http://fokibuzevurir.rf.gd/kikagatakizosovuka.pdf
    • https://s3.amazonaws.com/jedaxopopuko/medibang_pencil_brush.pdf
    • https://s3.amazonaws.com/gekojulog/solving_algebraic_equations_questions_and_answers.pdf
    • http://bilumolekotejoj.rf.gd/11585385592.pdf
    • http://fisazivibutaz.epizy.com/93846457053.pdf
    • http://lanelebitomutes.epizy.com/annus_mirabilis_dryden.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_off0000d1e2.bin
a24ae907905c5136bcbf8911ef8a0e680d2c40779496bddf511df693e318ae15
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E2 4956 bytes
font_01_sfnt_off0000e2a7.bin
c585a14df8c1bb35ac5fd136dd02ea2675ac56d91c8273c90e425e6235ce2705
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A7 10112 bytes
font_02_sfnt_off00010542.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x10542 4324 bytes