Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c7ca347417ea29…

MALICIOUS

PDF

87.9 KB Created: 2021-03-14 02:53:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: cf0191f1620b984a89e5c8f34bc5cb0a SHA-1: 033df3cda1d8f565db82cfb7fad96d4f4ade97dc SHA-256: 84c7ca347417ea299944f12e54e1bbc6b54a40d463e390f94798eafc6314cc7f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL `https://jacksth.ru/award?keyword=caracteristicas+del+materialismo+pdf` suggests a phishing or social engineering lure, aiming to trick users into visiting a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=caracteristicas+del+materialismo+pdf PDF link annotation
    • https://cdn.sqhk.co/juvowisire/RjhV8cd/56789303997.pdfIn PDF document text
    • http://tebafurunaxinuj.getenjoyment.net/6176856721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460076/normal_604b50620c5c1.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/fjdgchh/top_40_pop_radio_stations.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/Cgijehf/brim_combat_rush.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/eFgfLjj/86753113496.pdfIn PDF document text
    • http://dobuwiwitevotir.sportsontheweb.net/kiwusaporoboja.pdfIn PDF document text
    • https://cdn.sqhk.co/lixejudazeza/EiWhnha/kasigexere.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/ramawevotujag.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/gjgcQhj/woodturning_projects_for_craft_fairs.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/y9ujg97/73769979025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417652/normal_6021fe1d9dc9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/xubibilebaxolekopafe.pdfIn PDF document text
    • http://naxefugoxodikow.atwebpages.com/febrile_neutropenia_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/driving_school_2016_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/cycle_to_work_scheme_form_ireland.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/6263299842.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAE 5008 bytes
SHA-256: 37dad482ff65deeb9e655e07ef56d5eb300690672034dcb3f5b834227220c77c
font_01_sfnt_off000120bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BC 10436 bytes
SHA-256: f01a27b07d67c6f8529452e23e94e3b8e6230cdb593a0ce6b324d85b8a62e588
font_02_sfnt_off00014438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14438 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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