Malicious PDF — malware analysis report

Static analysis result for SHA-256 b023dc0d6934ad86…

MALICIOUS

PDF

70.8 KB Created: 2021-04-23 05:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cd566a8ddeba303713e6344c18f6ff14 SHA-1: f8848cd06e95a302f82c3152aa530f42919172fe SHA-256: b023dc0d6934ad86d91f270bbe599d967f28daa96ed55dd2c642111cfee6768e
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is identified as a credential phishing lure impersonating Amazon. It contains a mass of external links, many pointing to disposable hosting, and leverages a redirector to obscure the final destination. The presence of PDF-specific heuristics and ClamAV detection strongly indicates malicious intent, likely to exploit vulnerabilities or trick users into submitting credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://wironutoti.weebly.com/uploads/1/3/0/7/130739747/komeweketurale.pdf.
  • 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
  • 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://druttle.ru/strik?utm_term=winegard+sk-1000+trav%2527ler+rv PDF link annotation
    • http://xiwesesakuvel.medianewsonline.com/29136554475.pdfIn PDF document text
    • https://wironutoti.weebly.com/uploads/1/3/0/7/130739747/komeweketurale.pdfIn PDF document text
    • https://wozukaziximuru.weebly.com/uploads/1/3/4/5/134587045/wuduxovikasis_litil_musiwoxekova.pdfIn PDF document text
    • http://wikowezenitezo.medianewsonline.com/first_second_and_third_conditional_exercises_with_answers.pdfIn PDF document text
    • https://bitabado.weebly.com/uploads/1/3/1/4/131436956/7787625.pdfIn PDF document text
    • https://tulijibukabez.weebly.com/uploads/1/3/0/8/130814483/dutegiwone_xarimogot_vabusebujufi.pdfIn PDF document text
    • https://xulowipel.weebly.com/uploads/1/3/4/5/134594063/5794529.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/basketball_ball_handling_drills.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/990a05ec05fb3.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/3a4e7a67-b914-434c-97f0-ec8ccbdc922a/what_files_are_compatible_with_garageband.pdfIn PDF document text
    • http://lupemuvuxetamok.epizy.com/beautiful_pink_flower_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/4900125675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e78271d9-8007-46f5-9368-f7be520d6e19/what_size_is_kitchenaid_k45_bowl.pdfIn PDF document text
    • http://padegijogul.atwebpages.com/precalculus_with_limits_a_graphing_approach_6th_edition_online_textbook.pdfIn PDF document text
    • http://vosakazabed.rf.gd/proyecto_de_investigacin_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/380a08ac-5a0a-4eac-bc0e-7d01e9ea5566/fitokagawazabagolinibox.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/26553902531.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_off0000d59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59A 5392 bytes
SHA-256: c12a381e01747c22454b25e66db7d7d53836a501d509745dad5eedf1a5e57962
font_01_sfnt_off0000e82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 11236 bytes
SHA-256: addab5ddbf9001a346017dd71f1df204707741a1dbc4a87bd5698ae8c594449c

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