Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7fe6fd943c735c…

MALICIOUS

PDF

80.9 KB Created: 2021-04-17 07:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c13e70a9d2dd6b7ffb57e5a2af9c5fc5 SHA-1: 7eb9f916a6dc85722ad7a3ecba3cf687f4f2914f SHA-256: 9d7fe6fd943c735c447a94498307c048d716a57cc627af56fe5ce3e7b42be8cd
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains a lure related to 'how to fall in love with a stranger 36 questions', likely to entice clicks on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/strik?utm_term=how+to+fall+in+love+with+a+stranger+36+questions PDF link annotation
    • https://cdn.sqhk.co/difanemifal/Egchbae/jokajurizupesu.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/We3oWih/dead_man_walking_song_christian.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/gi7kdJf/tezebevofuwazivaxagelos.pdfIn PDF document text
    • https://cdn.sqhk.co/bukoxomule/cIjjd4n/jipefunudiretilorifojade.pdfIn PDF document text
    • http://basumoxivor.sportsontheweb.net/90457386885.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/MgghdOS/latalubitujogot.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/L60hijK/smart_tv_sale_50_inch.pdfIn PDF document text
    • http://vazolixamitom.22web.org/19784870255.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/Jvohdtr/tumblr_girl_drawing_black_and_white.pdfIn PDF document text
    • http://peguxukeziku.sportsontheweb.net/adolescent_health_care_a_practical_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/g8Rmiez/defender_2020_price_uae.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/xezofoxipewamuze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lozufusudurosok.epizy.com/karuppusamy_kuthagaitharar_tamil_movie_video_songs.pdfIn PDF document text
    • http://vebavibokifoko.epizy.com/hotel_management_system_admin_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/61922285406.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/wafewegujem.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/college_football_picks_week_5_bleacher_report.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/62851497739.pdfIn PDF document text
    • http://lozekav.epizy.com/missing_411_cases_pennsylvania.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/mindfulness_meditation_guided_5_minutes.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/how_to_change_pressure_on_remstar_pro_c-flex.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_off0000fee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 5588 bytes
SHA-256: 7d021ab9b4da4c218a85d022c303e7cd90dd5f99e2bb7ff0f66c35c442475ca0
font_01_sfnt_off000111f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F2 10628 bytes
SHA-256: 634ca2c08e79d49660ee01d7c39527aa3abd7fb006bf4e94f4d319e6816d2d0f

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