Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b453abf36d9dda3…

MALICIOUS

PDF

81.2 KB Created: 2021-03-23 14:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e3e4127b929c3c11212687d0bc4755a9 SHA-1: 290aad5c84e5f452984d4733a5589c88dd07bebf SHA-256: 8b453abf36d9dda3cbbb8fe93ca5757db47f7aab76b63168b1a5ae966497d4fc
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://seumenha.ru/strik?utm_term=how+to+repair+convection+oven+heating+element PDF link annotation
    • http://wivuperafuzo.mypressonline.com/calendario_laboral_2020_mexico.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5fef53146c098.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424662/normal_60583f385ecf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5fdc41b3139bf.pdfIn PDF document text
    • http://ruwazumusef.scienceontheweb.net/55371595413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_604ae8329f3f1.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/google_cloud_security_certification_free.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/is_it_possible_to_do_a_free_background_check_on_yourself.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416331/normal_603574121850e.pdfIn PDF document text
    • https://cdn.sqhk.co/paragapup/hbghghh/lease_agreement_template_colorado.pdfIn PDF document text
    • https://cdn.sqhk.co/buzivafulet/eDujb7S/bomber_friends_ios_hack.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/bss_coloring.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/mogudikexigotasexu.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/42657756244.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/acknowledgment_of_paternity_form_03pa209e.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/comparing_regressive_progressive_and_proportional_taxes_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f16b829a-6e9d-4ff0-a9f6-f0a69cbf6329/personajes_de_la_obra_la_ciudad_y_los_perros_de_mario_vargas_llosa.pdfIn PDF document text
    • http://sifebitufol.onlinewebshop.net/73602382252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1014577d-a6cb-47f7-b55d-4fde8628822f/c_interview_questions_for_10_years_experienced.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/mosivigipesofutaxajudela.pdfIn PDF document text
    • http://nubirumoxid.onlinewebshop.net/93032970145.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/xutonix.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_off0000fe86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE86 5284 bytes
SHA-256: b17f6dd99d1a3bc906168ef2722b1e05a3a26a1100c7af78eaf6692bb0a7c2f5
font_01_sfnt_off0001106e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106E 11440 bytes
SHA-256: c43ff71a5c40c22f63d844d3565e32ed15e81c671b4d6ab401bf4f84356d7dd5

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