Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d6bf606286b625…

MALICIOUS

PDF

75.4 KB Created: 2021-03-05 10:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 718b6a73f92597ed18be7e4e7ec7a620 SHA-1: 43a5f23609c9f025227a01232ac3c640e7b7e818 SHA-256: 28d6bf606286b62518cb03bfb7aac96a31e3ef387898bc75a57d5c7303120c96
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, with a high risk score. It contains an embedded URI pointing to 'https://leonvi.ru/aws?utm_term=do+dogs+ever+fall+into+a+deep+sleep', which is likely a phishing or malware distribution URL. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://leonvi.ru/aws?utm_term=do+dogs+ever+fall+into+a+deep+sleep PDF link annotation
    • http://waystep.site/antigone_sophocleprzvx.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/bofolanisirufufawaluj.pdfIn PDF document text
    • http://in-step.shop/business_intelligence_analytics_and_data_science_ramesh_sharda2r9i6.pdfIn PDF document text
    • http://chistohome.moscow/936396380497mytp.pdfIn PDF document text
    • http://astrology-personal.online/74652410646exnfo.pdfIn PDF document text
    • http://myimperfectmomlife.com/alfreds_basic_piano_library_theorvywk9.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/10755739807.pdfIn PDF document text
    • http://zetomanebegox.iblogger.org/apa_referencing_style_guidelines.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/tp_link_smart_plug_wont_connect_to_alexa.pdfIn PDF document text
    • http://vixesun.iblogger.org/ark_survival_evolved_apk_data_android.pdfIn PDF document text
    • http://kadanijojabuf.mywebcommunity.org/how_to_install_rear_brake_pad_clips.pdfIn PDF document text
    • http://batut.space/simple_business_process_document_templater4twc.pdfIn PDF document text
    • http://idealicaitaly.site/27353026617mpcei.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/fire_engine_bed_sheets0uhmv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fivebo/62418543210.pdfIn PDF document text
    • http://nabunuwo.epizy.com/1459754155.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/vuwosozonibiwuwaxax.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/advertising_company_profile_template.pdfIn PDF document text
    • http://pumumiz.epizy.com/24364553104.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/sotagifodopepuf.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/kirby_green_greens_sheet_music_violin.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/49977638276.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/red_bull_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/7334629845.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/86995297139.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/45107920295.pdfIn PDF document text
    • http://pekufupudemolor.epizy.com/691972808.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_off0000ea0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0E 5268 bytes
SHA-256: 4c5de2f7412c86944f1bdab9b3cb11e79a95486994e110ce1aafead99a6bec65
font_01_sfnt_off0000fc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC18 10508 bytes
SHA-256: c2a36b9e90cbd1954b1bd830c3d1e5d8dbf4d4beb9105323390443c1970db710

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