Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2f32fc1a3022a6…

MALICIOUS

PDF

77.9 KB Created: 2021-04-09 05:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 0cec7553cb3f9a56a8aad4a70fd98002 SHA-1: dcd78ac48e8e6d1f3fe4774af9934658ca98d436 SHA-256: 5b2f32fc1a3022a61a0a1fcb8c1b4fc6303d6f4181ec441953bb619acde5abd6
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs and is flagged by ClamAV as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains text related to search queries, suggesting a phishing or redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, further supporting a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=where+is+the+origin+of+basketball PDF link annotation
    • http://rulonoxoso.iblogger.org/barras_energeticas_para_deportistas.pdfIn PDF document text
    • http://in-step.shop/zifipigaxuguvotavoson56190.pdfIn PDF document text
    • http://iminn.ru/first_aid_step_144qbo.pdfIn PDF document text
    • http://devlp.club/the_last_survivors_movie_downloadpdobp.pdfIn PDF document text
    • http://esmoney.site/xekemetulogumonujpujp.pdfIn PDF document text
    • http://about-igsupport.com/sodixagenaginakaterp02da.pdfIn PDF document text
    • http://byseles.xyz/spanish_subjunctive_practice_worksheets_freeya0gd.pdfIn PDF document text
    • http://vkrowl.com/40k_8th_ed_changes55mht.pdfIn PDF document text
    • http://klosheff.xyz/kewojebunivebavbrypy.pdfIn PDF document text
    • http://orehi-siberian-force.online/fadabafode8c34y.pdfIn PDF document text
    • http://tertov.xyz/comfort_sentry_2_2_programmable_thermostat_manuali1bsy.pdfIn PDF document text
    • http://svarka-aurora.online/fozilamolaf7ju32.pdfIn PDF document text
    • http://photoforce.ru/snap_pandemic_assistance8flho.pdfIn PDF document text
    • http://byseles.xyz/40951092473lkum0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mimedixaresev.epizy.com/hd_background_car.pdfIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_1bd93bdcb0f04068bf495d95aadd4fcb.pdf?index=trueIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_00fd31a386ce444ab7b0783fa44823c2.pdf?index=trueIn PDF document text
    • http://mebebopolimo.rf.gd/57844070586.pdfIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_21f786adc7f94879bdb1bd152519a07c.pdf?index=trueIn PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_632ae069ba8c47afa712b45b9eb6da20.pdf?index=trueIn PDF document text
    • https://c948e902-2437-43f3-9f1e-7aaad30688a7.filesusr.com/ugd/464a75_f36d2bbea11347ddaa7274218b9a3590.pdf?index=trueIn PDF document text
    • http://xopezolesuvobut.rf.gd/74561270978.pdfIn PDF document text
    • https://677e6977-fc43-48b2-ac81-16e478c8573b.filesusr.com/ugd/3750c2_c456fa20f9a045c294e49d705a52d794.pdf?index=trueIn PDF document text
    • http://tukapir.epizy.com/69904016487.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_off0000f356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF356 5244 bytes
SHA-256: f393e5818da78980dcbf8b62a96fd0ffadf555d8715114d28337c834b7ed9e21
font_01_sfnt_off0001053a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053A 10732 bytes
SHA-256: 60deb115efa52c043a2d69d767263756e8b5c8415b08150d28aad9c98b18c4dc

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