Malicious PDF — malware analysis report

Static analysis result for SHA-256 091b91d2a323d772…

MALICIOUS

PDF

58.6 KB Created: 2021-03-20 15:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 955020dccbcaa94c74da54a03336be65 SHA-1: f0d6b83d86c085a93b02c22bd6b979c3d82cd2aa SHA-256: 091b91d2a323d77276422f4cf0d81d6408ca80387eeb2786f9fec7542934810d
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6893

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
  • 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://crophysi.ru/aws?utm_term=what+a+scrum+master+does+not+do PDF link annotation
    • https://cdn.sqhk.co/nuvexajamu/aidpgc4/my_little_pocket_pony.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384484/normal_60174001956ee.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/conversational_english_online_jobs.pdfIn PDF document text
    • https://busejutepegojo.weebly.com/uploads/1/3/4/7/134773147/fab3365f.pdfIn PDF document text
    • https://wotipivas.weebly.com/uploads/1/3/1/4/131482993/sexegi-wimiwan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413113/normal_6029c4424645e.pdfIn PDF document text
    • https://cdn.sqhk.co/pibavasedegi/lrhigis/ncaa_d2_soccer_championship_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/Xjbjeje/24251411972.pdfIn PDF document text
    • https://zunurevupuvofas.weebly.com/uploads/1/3/1/4/131438471/3f056f348ba28fb.pdfIn PDF document text
    • https://fularoxu.weebly.com/uploads/1/3/1/4/131452806/8c8e6.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/ghhgjiP/hcp_portal_quest_diagnostics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406463/normal_5fd7d12f695f5.pdfIn PDF document text
    • http://rokuboxajiga.medianewsonline.com/optimal_binary_search_tree_algorithm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_5fd7b1870aaf9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be054637-63de-4a1e-843f-e1e00878389c/naming_ionic_compounds_worksheet_answers_chem_worksheet_8-2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda5c9c8-828b-49dd-9699-32ce3e81fd28/sql_black_book_download.pdfIn PDF document text
    • http://defakulid.atwebpages.com/capitals_of_different_countries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3c8839-d459-4763-961d-75035bb1a06b/verb_practice_worksheets_high_school.pdfIn PDF document text

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