Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca18ba7753d69ddf…

MALICIOUS

PDF

63.7 KB Created: 2021-03-09 02:12:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4cd01878888060daeb7385a68876bbdd SHA-1: 6aaacf737637c212afa6b871ed08a27199737f0d SHA-256: ca18ba7753d69ddf7efe61d08d1476059e229470a9e1a068edc12bf4497742ba
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file that contains numerous links to external resources, many of which are hosted on disposable domains or link farms. The ML classifier and ClamAV detection indicate malicious intent, likely phishing or malware distribution. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, suggesting the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7645

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
  • 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://soxebez.ru/award?keyword=case+control+study+design+pdf PDF link annotation
    • https://cdn.sqhk.co/kawonidoza/Tid1hGF/skyblock_hypixel_pets.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/cKgiBhf/totally_accurate_battle_simulator_ps4_prix.pdfIn PDF document text
    • http://futup.ru/words_that_start_with_xenamqudg.pdfIn PDF document text
    • https://bunazavej.weebly.com/uploads/1/3/5/3/135316535/wopisakam_meremotuwajofi_mudefugubasu_kivav.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/CfFhhhg/flipping_101_house_fire.pdfIn PDF document text
    • http://prodson.space/96541385321855r7.pdfIn PDF document text
    • http://digogipexoluku.iblogger.org/85796671141.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/rilujuwogu.pdfIn PDF document text
    • https://cdn.sqhk.co/wisewuguv/6HiaKAw/infectious_disease_physician_salary_australia.pdfIn PDF document text
    • http://vuvuga.xyz/maquinas_electricas_guru_descargarad28v.pdfIn PDF document text
    • http://leafester.online/zuvelizetidofuluderel5hn.pdfIn PDF document text
    • https://mudobimug.weebly.com/uploads/1/3/4/8/134853100/xofazimiz_gewesu_zugexajogaka.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/best_giant_monster_movies_2020_download.pdfIn PDF document text
    • http://repofifimi.epizy.com/macmillan_english_worksheets_for_grade_7.pdfIn PDF document text
    • http://kovewufawik.rf.gd/jesojagu.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/answer_key_upsc_2019_set_c.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/are_sunkist_fruit_gems_gluten_free.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/37419304211.pdfIn PDF document text

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