Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab02e3ab68cb4d8d…

MALICIOUS

PDF

355.0 KB Created: 2021-04-04 08:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b1a439a49a6a68608421653f31545ace SHA-1: 9bc9456c263b46fcebc75197ad3c90c638d97a55 SHA-256: ab02e3ab68cb4d8de5c4f74f4be31fbb33f918d4e81f07b2a4c3a4c2de15b362
96 Risk Score

Malware Insights

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

The file is a PDF document that contains multiple embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to reference a chapter title, suggesting a lure to disguise the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9427

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://kuzutuzo.ru/wix?keyword=papa+a+toda+madre+capitulo+74 PDF link annotation
    • http://xilenemivagola.mywebcommunity.org/kabexizovakugakazupub.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/read_the_adventures_of_sherlock_holmes.pdfIn PDF document text
    • http://pimesizawox.sportsontheweb.net/shadowrun_5e_weapon_accuracy.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/howls_moving_castle_wallpaper_engine.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/41401735382.pdfIn PDF document text
    • http://electriccannoz.club/cookie_swirl_world_play_for_freelooop.pdfIn PDF document text
    • http://bamupiwabibajew.mywebcommunity.org/gujarati_aarti_sangrah.pdfIn PDF document text
    • http://dfds.in/jose_emilio_pacheco_las_batallas_en_el_desierto_descargarmto5p.pdfIn PDF document text
    • http://gukivuzijisuva.getenjoyment.net/91435691858.pdfIn PDF document text
    • http://makelemeg.mygamesonline.org/rocker_anarcho_syndicalism.pdfIn PDF document text
    • http://xexejevun.medianewsonline.com/94235941761.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/47316799467.pdfIn PDF document text
    • http://wosedumuf.mywebcommunity.org/bawereneli.pdfIn PDF document text
    • http://tesekiwig.scienceontheweb.net/girefokubasosewemawuziva.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/ethical_hacking_degree_course_in_kerala.pdfIn PDF document text
    • http://sugebowupubixo.mypressonline.com/53335095466.pdfIn PDF document text
    • http://golixudib.mypressonline.com/sasolifolesugazigonafa.pdfIn PDF document text
    • http://zaxiluxedexu.getenjoyment.net/the_chronicles_of_narnia_the_lion_the_witch_and_the_wardrobe_cast_1988.pdfIn PDF document text
    • http://melomone.scienceontheweb.net/definition_of_accounting_principles.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://63995da9-74be-4895-8497-a4fa53c9845d.filesusr.com/ugd/788c84_9daf534a461c4fd888d0a6030e6f9226.pdf?index=trueIn PDF document text
    • http://moxadokikubod.onlinewebshop.net/addition_and_subtraction_of_dissimilar_fractions_worksheets.pdfIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_1bac1a62e52543739ee7a4745c53b8ac.pdf?index=trueIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_d7ab96a271d840c493bc1787e9063267.pdf?index=trueIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_5625d4c0947d4f77b12dc3ff5678568d.pdf?index=trueIn PDF document text
    • http://roporuti.onlinewebshop.net/mebexebugazusonotipemo.pdfIn PDF document text
    • https://09d7e2b9-79a3-4876-9e00-73a1ba4263a4.filesusr.com/ugd/92fcd7_b4fdb78944484f39945d11369072076b.pdf?index=trueIn 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_off00053e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53E15 5208 bytes
SHA-256: a84e9e170fc6780469c8ea25b8dfe70627a1e79f26716298b1bd0e612f193d1d
font_01_sfnt_off00054fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54FC5 13392 bytes
SHA-256: a49286513b2d592df4d7e69478801e3decf19f6425ba4d3dbea1fd67e4a37283

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