Malicious PDF — malware analysis report

Static analysis result for SHA-256 4736c5b728dd5532…

MALICIOUS

PDF

59.6 KB Created: 2021-02-26 11:30:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0a51fe700de82c29647e2a08cbf103c3 SHA-1: 07420d6b52fd57f9cff5749f581aabaf9bc46ea3 SHA-256: 4736c5b728dd55324494ef81c404a45089d583f2775b2991d82b29b37f285acd
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with many pointing to disposable hosting services, suggesting a link farm or phishing operation. The PDF's structure and embedded links are indicative of a spearphishing attachment, aiming to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7054

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://leonvi.ru/award?keyword=the+mysterious+benedict+society+movie+dream+cast PDF link annotation
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/sugemos.pdfIn PDF document text
    • https://xufidevudog.weebly.com/uploads/1/3/4/3/134389214/1a704af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5fe63307e1363.pdfIn PDF document text
    • https://cdn.sqhk.co/kinerufi/KjiwyP6/47794093786.pdfIn PDF document text
    • https://rikekipodoze.weebly.com/uploads/1/3/0/7/130776447/2131d3686e57f8.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/l1qzTjd/personal_care_assistant_resume_summary.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/469a5ced236217.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/hiaJegj/invitational_counter_sniper_team_competition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402507/normal_5ff64c51bac60.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopivosoba/phicObg/jajotevatakenebe.pdfIn PDF document text
    • https://cdn.sqhk.co/kezinujus/cicoShi/rukebodarobaxiwesugafu.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/fjeLNid/how_to_make_racing_go_kart_tire_prep.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/from_the_mixed_up_files_of_mrs_basil_e_frankweiler_chapter_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/free_sat_math_practice_test.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/70406337993.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/hire_purchase_agreement_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/bluestacks_install_apk_mac.pdfIn PDF document text

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