Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e7ac50c95f382e…

MALICIOUS

PDF

77.6 KB Created: 2021-03-06 18:23:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 680428bd6691b48bdbd1945f91ffc5e8 SHA-1: 4914ba1f5ee38c09eb871e582d7d9dfc7a917da3 SHA-256: 40e7ac50c95f382e276324bf4e2aca56d92d6899a8549b9e5da0dc9667fe1d86
126 Risk Score

Malware Insights

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

The PDF document contains numerous links, many pointing to disposable hosting, and one prominent URL that appears to be a lure for financial trading information. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on potentially untrusted domains, suggesting an attempt to manipulate search results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://baarspo.ru/aws?utm_term=are+swing+traders+successful PDF link annotation
    • https://cdn.sqhk.co/xerejijasoma/TghjgsS/free_lesson_plan_template_for_preschool_teachers.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/dmYgfhm/xulaxunozulawivajesuxada.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/intermec_pm43_load_ribbon.pdfIn PDF document text
    • http://pejazadajenatew.getenjoyment.net/how_to_think_about_weird_things_8th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/ogfFjaM/vefobiwutijumolumagosu.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/higsjba/best_screen_on_time_android_phone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_9d3e59131dae46f5a9e4ba0742a502d4.pdf?index=trueIn PDF document text
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_4c806be15a814bd689ce52ab30998a3f.pdf?index=trueIn PDF document text
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_a3ced81369e94695a0b4f14d27c777d5.pdf?index=trueIn PDF document text
    • http://jelepodun.epizy.com/batewidegusaxodokogara.pdfIn PDF document text
    • http://bategozejaxa.rf.gd/what_is_a_maiden_voyage_mean.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/candide_voltaire_chapter_18_summary.pdfIn PDF document text
    • http://moxilapavaz.rf.gd/vulizozakek.pdfIn PDF document text
    • http://bajejefi.epizy.com/98404705414.pdfIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_e5b1664bd39e4e8a86109f65de5af8be.pdf?index=trueIn PDF document text
    • http://zuzofigub.rf.gd/25354286912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/075a4d84-7be6-4585-a037-a273c85141de/86767487928.pdfIn PDF document text
    • http://juxugalipexobow.epizy.com/badminton_technique_tactics_training.pdfIn PDF document text
    • http://mixonanax.epizy.com/guide_book_of_class_9_science.pdfIn PDF document text
    • http://mubaviz.epizy.com/power_air_fryer_recipe_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44eede84-3282-4b65-a64e-de240cefe4c6/rhino_tutorials_architecture.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_b431eea407644dd78c937a057cfda345.pdf?index=trueIn 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_off0000f26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 5268 bytes
SHA-256: 6de0c934cefb42a399f6e232a7da618d4191ad98be26b41b8f323ba02d1c0688
font_01_sfnt_off0001047c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047C 10776 bytes
SHA-256: 659c14505572bd38de8ba181077307ba47d87f9afa060edf3bf452e083bcdf74

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