Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6734581ce5e7e73…

MALICIOUS

PDF

67.7 KB Created: 2020-12-06 03:56:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7cd3132e436044f21e77410480b05e06 SHA-1: d673b77c68e99343d982e3cc0e5b78889b1ffe22 SHA-256: b6734581ce5e7e732e7cab6ac9340b28e0d15904fec04fe0e38343030c47cbe4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://cctraff.ru/strik?utm_term=cuisinart+pressure+cooker+cpc+600+manual In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/81b23146-37fb-4297-961d-8854bf6fbadd/tambayan_pinoy_movies_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/68998904023.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b9b8abaecd33182e01d5/t/5fc5a5afeaf37e3b645f2c2f/1606788533870/lord_of_the_flies_map.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/hernia_inguinal_pediatria_medigraphic.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdef4261e25426e1fdd5ba/1606283074946/split_canvas_prints.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe07e4fa04221c71e7bbd7/1606289381181/jitezew.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/93465828936.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/vk_publications_accountancy_class_11_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/bleacher_report_college_predictions_week_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0ada78-f9a8-4d3a-a2b4-7d60b3e16cc3/dds_plugin_for_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/the_master_guide_to_drawing_anime_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4d4436-73e4-495c-883c-0c23e431f399/11817421199.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/omron_hem_637_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/50786906053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/091eb6be-c0bc-4347-b832-6fdf33635161/rujofiwatam.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cde6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE6 5344 bytes
SHA-256: bee493c7af9b1389a58de2063e7faf6b35caf96252882dd9a53ac5d7ad9a9ebe
font_01_sfnt_off0000dff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF8 10000 bytes
SHA-256: 1b2c88caf98e2c1d30fd99c14545608fbbb559d09eb5d5345c3c45ad65bc86cd

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