Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76efbb0a796a28a…

MALICIOUS

PDF

68.4 KB Created: 2020-12-20 06:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 434d57058c566fad79cd2b523b052597 SHA-1: 92f99a3bf5c41bafc6a97ba25a2cb9a292c6ba15 SHA-256: b76efbb0a796a28aa5d39417d063a6672c1b300a43e0d33564b53af3b3737034
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=pelvic+cavity+anatomy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412378/normal_5fd78f98e1f75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419193/normal_5fa396186fa03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_5fbf07b1eeeef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414847/normal_5fce83327ce9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473403/normal_5fb2e9ae76067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419424/normal_5f98f343ae07a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5fda1d30a1aa2.pdfIn 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/4b6877db-9bad-4504-a403-67f38c67160e/16594547723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe1661d-e999-4849-9e7f-55064b35293f/nursing_care_plan_for_liver_abscess.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7855e1a9b7f6479380a92/t/5fcbb13fbce7087d1ae33e51/1607184706466/lakafevipuras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c84244d-cf29-49ac-bdb4-7a0699c2d4d6/desmos_unit_circle_radians.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/674ca99e-0c76-4c8f-ab9b-9bdd711b2911/kobekobugofowi.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/20042762027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe062f2-1aa1-410d-8391-1a6bb0659a6f/xibulukaporovawiruzujo.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/kapiolani_community_college_class_availability.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD126 4836 bytes
SHA-256: 0d72e951352ea86caba6e5509dc658d702151c9f016f4824273c77750c6ce52e
font_01_sfnt_off0000e197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE197 10364 bytes
SHA-256: 0b0359ff70f7612d1c257534c831eb1959cd331228a75403babc363279b2ab90

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