Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28bd7df26729cee…

MALICIOUS

PDF

73.1 KB Created: 2021-04-04 14:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4087daad7835d06888b25ab29a0f7bcc SHA-1: ea39c03679e482be21d995ba55995e6066fd8504 SHA-256: e28bd7df26729cee882e9ad2078b4235e2c0b7834e0186351e309fec43f64432
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to an academic syllabus, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/award?keyword=bsc+agriculture+new+syllabus+pdf PDF link annotation
    • http://rozujed.sportsontheweb.net/2007_jeep_grand_cherokee_crd_oil_capacities.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/rNzcgeG/retro_arcade_store_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/eqUShaR/83405682648.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/Omusgfm/lamomo.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/Mhbhgja/dungeon_keeper_2_creatures.pdfIn PDF document text
    • http://fizarumokugafu.mywebcommunity.org/wubefuninosafegojodepona.pdfIn PDF document text
    • http://xogubafirugufa.iblogger.org/4654429001.pdfIn PDF document text
    • http://gejikojaki.scienceontheweb.net/anatomy_and_physiology_of_brain_and_nervous_system.pdfIn PDF document text
    • http://viteroludobano.mypressonline.com/hakikat_pendidikan_islam.pdfIn PDF document text
    • http://vurenosul.22web.org/brendon_burchard_high_performance_habits_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d426075-6511-4ec7-936f-ed77c9fa1251/grendel_book_review.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/json_to_java_string_formatter_online.pdfIn PDF document text
    • http://kavizerexu.rf.gd/53188627895.pdfIn PDF document text
    • http://lawubipala.epizy.com/fikulaparekemobe.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/h_m_uk_ladies_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/lokegawuxexa.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/fill_in_the_blank_transition_words_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/dajusifi.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/butasivune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdfdf73e-3a76-45f8-87e0-b350bc1704b7/which_of_the_following_is_a_topic_studied_in_macroeconomics_quizlet.pdfIn PDF document text
    • http://dakamonegip.rf.gd/historia_de_la_diabetes_gestacional.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/agnisakshi_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/ruxesemukutevudapinumaza.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_off0000e164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE164 5708 bytes
SHA-256: 0e288a3019b41499ec01356c9072aff0a82467768bdd4bd004157ef660a60fb5
font_01_sfnt_off0000f4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EE 9940 bytes
SHA-256: 920986a1ae43b0d6b84b057d9434101d7c8407971d60b9ff9265e2f34c2cd542

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