Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f0daa24a5183ac…

MALICIOUS

PDF

93.8 KB Created: 2021-04-02 01:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3e4a03268bcc8ed90b9cc48c30120106 SHA-1: 7325ca065b4da6e46a1e5be848deceff2a9c75ae SHA-256: 62f0daa24a5183ace2af813e5ee291d4c7720fa5863e6aba67ee86309e5258d6
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure malicious links within a large number of seemingly legitimate ones. The primary malicious URL identified is https://dugedepap.ru/strik, which likely serves as a landing page for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://dugedepap.ru/strik?utm_term=willy+wonka+and+the+chocolate+factory+book+plot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450430/normal_601f7dfb7ae0f.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/antropoloji_anadolu_niversitesi.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/blacksmithing_books.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446016/normal_6063cfc832bf0.pdfIn PDF document text
    • http://werojati.getenjoyment.net/what_is_the_meaning_and_definition_of_personnel_management.pdfIn PDF document text
    • http://rcasino.info/present_perfect_exercises_eslyht2h.pdfIn PDF document text
    • http://lanujozawodu.sportsontheweb.net/46583274594.pdfIn PDF document text
    • http://4gusevshop.space/bowavogizaxivekuponejmdt1.pdfIn PDF document text
    • http://pixxel.life/management_information_systems_managing_the_digital_firm_13th_ed9due5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_603d02e466796.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/09e459ad-ac70-447a-bba5-60a8553eff04/36817600956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f5e65f-a522-4dd6-b9bf-617715d10a4e/malafipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73550908-466f-4826-a234-ec18f094d49d/91071384675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7180c998-7dd8-4e7a-8bb9-e26cf8ddfe90/ignou_ba_philosophy_books.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/roduxovalezek.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/62559866658.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/fefoz.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/integral_secx_tanx_3_sec_x5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ef456f-d8c4-40bc-9571-3b5f731d894d/92459616173.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/xivajekidafupiropuwalala.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/mp_map_full_size.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/1549611342.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_off00013087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13087 5476 bytes
SHA-256: d1455a8a3aadd40e834b53512308610c65e8c394224da4a82be2fa9eb7c0136c
font_01_sfnt_off0001433e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1433E 11236 bytes
SHA-256: c4b7442aabd3ae4b47e85b66e71bbd3058ea403cdc727245ce52796f642f46bc

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