Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dc26a29073c462…

MALICIOUS

PDF

94.9 KB Created: 2021-03-21 05:31:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4d369dd18c0422cae1f72b53f9e8613 SHA-1: ef843a950b611753624521ad4e4d57693add0b4c SHA-256: 74dc26a29073c46221ca64b03636a3b76f3bee9e339610543e31da2c78379ce2
96 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 as a phishing trojan. It contains an embedded URI pointing to 'https://bologen.ru/award?keyword=sermones+evangelicos+para+predicar+pdf', which is likely a phishing lure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/award?keyword=sermones+evangelicos+para+predicar+pdf
    • http://creditscorecard.info/negufextg92.pdf
    • https://cdn.sqhk.co/tezofugowura/qhiNJh6/vinidukapagugepodugisegaz.pdf
    • http://marketitaly.info/anet_a6_printer_settings3b5mj.pdf
    • https://cdn.sqhk.co/wimiwupo/hgdiMgh/asa_change_interface_security_level.pdf
    • http://triple-doska5.club/import_keynote_to_slidesu8w8z.pdf
    • https://cdn.sqhk.co/dekorasenu/hhjfors/1000_scenic_loop_kingsland_tx.pdf
    • http://digitalliteracyinstitute.com/zifowuredapivu2mh7s.pdf
    • http://modozadubop.mywebcommunity.org/bewipogewawo.pdf
    • http://netlysy.online/72273274447voppq.pdf
    • http://good-production17.site/wowonovatigudugenujot2wdb9.pdf
    • http://rozewevojalel.sportsontheweb.net/desigualdad_mundial_branko_milanovic_gratis.pdf
    • https://cdn.sqhk.co/bipokagiti/ieTjjje/oxford_english_dictionary_offline_download_for_pc.pdf
    • https://cdn.sqhk.co/jegamaxegev/XMbK3gj/80889303911.pdf
    • http://creditscorerepair.info/log_log_graph_paper_exceles0z5.pdf
    • http://tpdreport.com/what_are_the_responsibilities_of_an_operations_directorerg2k.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fotojipifuzitul/68247016188.pdf
    • https://s3.amazonaws.com/labitajaxatufib/absenteeism_thesis.pdf
    • https://s3.amazonaws.com/fodose/82951331437.pdf
    • https://s3.amazonaws.com/bagisi/how_often_empty_thetford_toilet.pdf
    • https://s3.amazonaws.com/jadere/intermatic_wall_timer_setting_instructions.pdf
    • https://s3.amazonaws.com/gagagakigibapo/best_photography_book_printing.pdf
    • https://s3.amazonaws.com/ragejufa/the_blood_of_olympus_books_cool.pdf
    • https://s3.amazonaws.com/daniwodug/asimov_foundation_synopsis.pdf
    • https://s3.amazonaws.com/xojafemori/surah_an_naba.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_off0001325c.bin
8d3153d8a4ed66c05364cac1c95b16d1ff6b8477c06e0be4bd7bdc088424efa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1325C 5636 bytes
font_01_sfnt_off0001457e.bin
176c3dc768a12672ae907ad9ab4349f938bf0047f01dc34e73867fef5b7ead19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1457E 12104 bytes

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