Malicious PDF — malware analysis report

Static analysis result for SHA-256 d406facbc63ea638…

MALICIOUS

PDF

78.5 KB Created: 2021-03-31 11:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9de9834b3649a3302a05f0f27056241e SHA-1: 322c34732c90680105044980f8dfca578a9a51f9 SHA-256: d406facbc63ea6382a207501e94999d2c4497efadf5093fb9a835481aa9da823
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL `https://midufefew.ru/wix?keyword=what+is+a+feature+type+leader` suggests a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://midufefew.ru/wix?keyword=what+is+a+feature+type+leader PDF link annotation
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/08ce384e5e76.pdfIn PDF document text
    • https://gazekusiparisom.weebly.com/uploads/1/3/4/0/134012522/3144236.pdfIn PDF document text
    • http://xalapuzim.sportsontheweb.net/himno_del_maestro_panama.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/mefofisebup.pdfIn PDF document text
    • https://betewobinolatid.weebly.com/uploads/1/3/4/7/134756009/2c74bd817c89.pdfIn PDF document text
    • https://nogisapu.weebly.com/uploads/1/3/1/4/131453993/vowupitetezifufopuf.pdfIn PDF document text
    • http://xejelofewi.mygamesonline.org/catia_v5_basic_tutorial.pdfIn PDF document text
    • http://dubunidenore.iblogger.org/zuxik.pdfIn PDF document text
    • http://vetozadep.mywebcommunity.org/watts_premier_ro-pure_replacement_faucet.pdfIn PDF document text
    • https://maraliva.weebly.com/uploads/1/3/2/7/132712127/3a4db.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/mathematical_modelling_and_computer_simulation_of_activated_sludge_systems.pdfIn PDF document text
    • https://ranetaxute.weebly.com/uploads/1/3/4/8/134886021/15f0aa7775bbb.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/3104774.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/polexebuj/hec_lat_2018_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/96321557049.pdfIn PDF document text
    • http://vekisofekibote.myartsonline.com/anatomy_lessons_from_the_great_masters_free_download.pdfIn PDF document text
    • http://jujabezemaluwe.rf.gd/analog_and_digital_communication_tutorial.pdfIn PDF document text
    • http://muvipej.atwebpages.com/zugikezilurivodizi.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/haunted_taylor_swift_piano_sheet_music.pdfIn PDF document text
    • http://wupebixa.epizy.com/sample_interview_questions_and_answers_for_managerial_position.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/mexican_american_war_dbq_documents_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/xazavu.pdfIn PDF document text
    • http://joxedebonod.rf.gd/lakupuzipejisot.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_off0000f2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EC 5244 bytes
SHA-256: ca3d7dbdec3358135411231652c730b023d398da654dd4216412c724a5411336
font_01_sfnt_off000104d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D1 11236 bytes
SHA-256: 0eb43a086362d3facd26b734b32bf8cdecf3d6aea306e0c0a681ad4d9a61440c

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