Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef27ecbcef2dce5…

MALICIOUS

PDF

82.6 KB Created: 2021-04-25 19:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4183e2a7a4910e851325f939032a1bf9 SHA-1: ceaab6992878873302332a5fea8a922654fe81e2 SHA-256: 9ef27ecbcef2dce53addd71fe4e79c042b8aff9d0adadc0a377c28454f968563
104 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/strik?utm_term=ethiopian+grade+2+english+textbook+pdf PDF link annotation
    • http://rofuxipof.mywebcommunity.org/mini_dv_cassette_walmart.pdfIn PDF document text
    • http://bagevelotalapam.22web.org/percentage_increase_and_decrease_questions_and_answers.pdfIn PDF document text
    • http://fakaluwu.scienceontheweb.net/antiochus_epiphanes.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/sopixipezafugogepuzaliv.pdfIn PDF document text
    • http://matirimekege.22web.org/nafajonugeni.pdfIn PDF document text
    • http://zisapawiwako.mypressonline.com/bharathiyar_kavithaigal_in_english.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojanapijavavo.rf.gd/xusuz.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/little_shop_of_horrors_feed_me_full_song.pdfIn PDF document text
    • http://puriruf.epizy.com/typographie_a_manual_of_design.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/the_chronicles_of_narnia_movies_chronological_order.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/casio_gzone_ravine_2_4g.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/vampire_armor_mod_skyrim_se.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/3650700543.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/what_does_the_law_commission_do.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/98952867218.pdfIn PDF document text
    • http://vapovalexuma.epizy.com/fulbright_personal_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/teacher_cv_templates_free_word_document.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/birthday_background_png_format.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/1684741883.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/ios_design_guidelines_picker.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/aps_csb_answer_key_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/53982288542.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/hxh_biscuit_true_form.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/kidamisasaj.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_off00010474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10474 5664 bytes
SHA-256: e2c18aad90e4da3c3fbc722ec651421d0070a64dc1eddbe84d7d5e3cf6bbbfbb
font_01_sfnt_off000117b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B2 10948 bytes
SHA-256: 024ec71ce67b679ffd229c7baa60f439dd9e37def890dc7cd25390fd48f7b064

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