Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5ecbc404525c49…

MALICIOUS

PDF

65.4 KB Created: 2021-02-28 13:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6327bd049b64f17a7f406addc77479dc SHA-1: a3872c6b277d47a9e72eb268e8e048a42421b945 SHA-256: bc5ecbc404525c49850ec6d2cde16406cb5dce4fbcfb1fab4c6c77e233edfe4b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, a technique often used for SEO poisoning or phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9578

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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/award?keyword=what+time+to+pray+salatul+istikhara PDF link annotation
    • http://gutagige.sportsontheweb.net/prayers_that_bring_healing.pdfIn PDF document text
    • https://cdn.sqhk.co/lalusozokigi/YXmFyls/brawl_stars_rogue_mortis_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepilekot/gTjjjaV/50002180992.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/krX2jey/bandai_namco_entertainment_video_games_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/LlP5jbk/35352115813.pdfIn PDF document text
    • https://pakotoroxup.weebly.com/uploads/1/3/0/8/130815058/muben.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/gjhaegE/police_car_vs_theft_bike.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/28414028367.pdfIn PDF document text
    • https://cdn.sqhk.co/budafitanu/Z4rhahf/44016311306.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/aircare_humidifier_error_code_ec.pdfIn PDF document text
    • http://kimitumepogamom.epizy.com/osteoporosis_guidelines_nice.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/gulumarivolumelitimowabaw.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/39753340134.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/13959784335.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/precalculus_chapter_1_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/51660375626.pdfIn PDF document text

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