Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bbd0bec5eda10c1…

MALICIOUS

PDF

82.6 KB Created: 2021-04-21 20:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08a58cde2faa81112ac3878231d8491b SHA-1: a653001ecf936a7512585adbe05a47a66f60e43e SHA-256: 7bbd0bec5eda10c11f184087cc7a3bbf1d9ec9f5c7eb9c2aa046afeaccedefda
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jacksth.ru', which is likely a phishing or scam link. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=best+bathroom+fan+heater+light+combo
    • http://vodoroding.info/best_foods_that_dont_have_glutena430t.pdf
    • http://wowit.pro/udal_uravu_eppadi_seiya_vendum_videoqmc5j.pdf
    • https://static.s123-cdn-static.com/uploads/4421473/normal_6002c374442ba.pdf
    • http://afracheat7.xyz/maaza_agadbam_2_full_movieszc4e.pdf
    • http://kvyovk.xyz/cunto_cuesta_un_juicio_sucesorio_testamentario_en_mxicolcgq5.pdf
    • http://eu-study.ru/wigenximah.pdf
    • http://riniwodifole.medianewsonline.com/non_probability_sampling_in_research.pdf
    • http://juilopkiretlo.ru/resmed_airsense_10_autoset_for_her_filtersteu92.pdf
    • https://cdn-cms.f-static.net/uploads/4445869/normal_60631a3d1411a.pdf
    • https://cdn-cms.f-static.net/uploads/4466135/normal_60425eced7088.pdf
    • http://mbfsopg.com/eu4_best_vassalsy4fya.pdf
    • https://cdn-cms.f-static.net/uploads/4485570/normal_60662ca2a8f41.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pajeriramal/dewalt_20v_drill_combo_kit.pdf
    • https://s3.amazonaws.com/juzewojavomofew/a_gentleman_full_movie_300mb.pdf
    • https://s3.amazonaws.com/rufonali/cazadores_de_sombras_ciudad_de_hueso_actores.pdf
    • https://s3.amazonaws.com/wapabefizosumi/almond_breeze_milk_nutrition_information.pdf
    • https://s3.amazonaws.com/fusopoxipo/rezizotokitit.pdf
    • https://s3.amazonaws.com/gebukil/mvc_interview_questions_and_answers_for_experienced.pdf
    • https://s3.amazonaws.com/pusori/2021_lds_youth_theme.pdf
    • https://s3.amazonaws.com/zemunomipazikez/fosonozofopatuwewegusovot.pdf
    • http://sopexalibip.onlinewebshop.net/redokusop.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010447.bin
3eef54c293e1afbbcf51c793b6b591f98217d06406f245653218cd0354aea682
pdf-font-stream PDF embedded font (sfnt) at offset 0x10447 5484 bytes
font_01_sfnt_off000116d1.bin
2b4aa32141dc8e91e15b5be74d02dce3efafebc6c083a945b815718bbce58a43
pdf-font-stream PDF embedded font (sfnt) at offset 0x116D1 10920 bytes