Malicious PDF — malware analysis report

Static analysis result for SHA-256 5144cb5bf8ef1e9d…

MALICIOUS

PDF

118.7 KB Created: 2021-03-20 17:01:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b68f70a4d0a71a691096355c5a4ad3fe SHA-1: 06c9501266454fdcb29714820e089cec37ae988c SHA-256: 5144cb5bf8ef1e9d8b3b7e88a411693ead18fd26227554d70e81e0b584604610
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/aws?utm_term=berlioz+symphonie+fantastique+5e+mouvement
    • https://cdn.sqhk.co/nanubebebot/cOjhnRG/64806775070.pdf
    • http://fijixedi.22web.org/32625623391.pdf
    • http://kelimap.mywebcommunity.org/50318289678.pdf
    • http://gbo.guru/usage_of_rankle_in_a_sentence6beow.pdf
    • http://rowexusaje.mypressonline.com/soxobapekulisil.pdf
    • http://rent-nout.site/4650620743l7hvt.pdf
    • http://datab.vip/leer_el_talmud_en_espaolmevz7.pdf
    • http://copyrightsupportforlnstagram.com/loberevosiwujrxs6z.pdf
    • https://cdn.sqhk.co/tebefaravuz/jMgj3if/resumufapena.pdf
    • http://nakijeku.mygamesonline.org/academic_english_exercises.pdf
    • http://kitafoged.medianewsonline.com/malibu_lights_led.pdf
    • https://cdn.sqhk.co/bepigulusibe/hajhiiY/fitivit.pdf
    • http://terugate.mypressonline.com/63196988890.pdf
    • http://kogutojoveso.mywebcommunity.org/app_to_download_free_books.pdf
    • http://fullstacket.online/ly_words_spelling_listbbxz0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xanuvajunozim.epizy.com/calendario_agricultura_biodinamica.pdf
    • https://s3.amazonaws.com/figugipopar/blank_circle_logo_template.pdf
    • https://s3.amazonaws.com/badodemebo/lubawafo.pdf
    • http://jefebewo.epizy.com/ballad_of_serenity.pdf
    • http://dozuxix.myartsonline.com/pdf_booklet_creator_free_software_download.pdf
    • https://s3.amazonaws.com/rekorewexidiwo/dungeons_and_dragons_dice_roll_gif.pdf
    • https://s3.amazonaws.com/somamere/podekonusezezolisex.pdf
    • https://s3.amazonaws.com/kagedatabujo/covax_aim_trainer_free.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000178cc.bin
f33c09ce07d073e923bdab6556b90fa97df66217784df68ce19cb290505330d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x178CC 5652 bytes
font_01_sfnt_off00018bf5.bin
00d4bf6ffc96365ea83b57b096f8cc61a33aaa8b98d5d8b650daee259a3c0368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18BF5 13920 bytes
font_02_sfnt_off0001b76a.bin
15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B76A 16120 bytes

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