Malicious PDF — malware analysis report

Static analysis result for SHA-256 84456f58d8475bcf…

MALICIOUS

PDF

52.6 KB Created: 2021-01-06 20:36:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ec9954f771852103287edb98af2cddbe SHA-1: 551aff52d7f1e73d165ddf64690ad47941edbe5f SHA-256: 84456f58d8475bcf60e14d9e57c0d6b2285ed28fb7c31d0597a584221685dff3
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.8773

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 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.
  • 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://traffking.ru/aws?utm_term=budget+spreadsheet+printable PDF link annotation
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/9730034.pdfIn PDF document text
    • https://nopefulewipedu.weebly.com/uploads/1/3/4/3/134314682/7956e4.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/goalkeepers_with_most_clean_sheets_ever.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88a3ba45-11d2-458a-b3c0-f9d391ec072a/gestion_de_stock_d_une_pharmacie_en_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b38f8d-65b9-4531-beeb-ae8fa7bbab58/29884161395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b138b4-a1e3-4cb9-bcd3-94c29695452c/conflict_immunity_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c5f367-c6da-446a-b6d4-bb6c7716fc9b/benchmade_infidel_3300_review.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/ignou_admission_form_for_ma_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cece62d-70a8-44d8-bdbc-f2c4fbabd566/97762587930.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/4824756051.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/breaking_free_from_ocd_a_cbt_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/cirrosis_hepatica_alcoholica_fisiopatologia.pdfIn PDF document text

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