Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6f806860346062…

MALICIOUS

PDF

84.0 KB Created: 2021-03-20 02:15:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 20c2e10f54b8864669d9dd713050b909 SHA-1: 7f89c9e8510b2526273b53bbad7f82003022aeb3 SHA-256: 4d6f8068603460625cac27341648e7e0e84304d6935074cf4c3b34dc9225a4cc
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one pointing to 'jottigo.ru', suggesting it's used to redirect users to potentially harmful content. The PDF structure and embedded links are indicative of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/award?keyword=marketing+research+an+applied+approach+pdf PDF link annotation
    • http://vukogosapejofa.iblogger.org/jokojazigikile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387035/normal_6006905f2a0c0.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/f3Siahe/fowuriwevivamute.pdfIn PDF document text
    • https://cdn.sqhk.co/dojiwazufek/jtrogil/prehistoria-_etapas-_linea_de_tiempo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5fd6709c31ef8.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/amoeba_sisters_video_recap_of_mutations_worksheet_answer_key.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/wimilevuzasafogesexep.pdfIn PDF document text
    • https://cdn.sqhk.co/koxajavu/C3Nidja/pawn_shop_master_mod_apk_android_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420224/normal_600368046351a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470553/normal_6035bbbe1c8f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_5fd0eb463d493.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://funazowo.rf.gd/angularjs_simple_login_form_example_plunker.pdfIn PDF document text
    • http://tosabukevosubar.myartsonline.com/best_business_plan_format.pdfIn PDF document text
    • http://kosidigipetuvu.epizy.com/sovil.pdfIn PDF document text
    • http://gagisejokunego.rf.gd/85450805139.pdfIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_2f4bfcd1407c4cd1a2799621828c2142.pdf?index=trueIn PDF document text
    • http://tinejotawev.epizy.com/les_mis_musical_awards.pdfIn PDF document text
    • http://zuwarikufaz.epizy.com/django_templateview_get_parameters.pdfIn PDF document text
    • http://lewabebobi.rf.gd/best_settings_for_snow_photography.pdfIn PDF document text
    • http://zuxamivim.epizy.com/85438494830.pdfIn PDF document text
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_4fa018d2bce44044873225772d5ee5dc.pdf?index=trueIn PDF document text
    • http://fejusadifidexi.epizy.com/cacique_cheese_nutritional_information.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_off00010b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B82 5484 bytes
SHA-256: 509bd46de3d23d95085553cc3f768f44d7f713c27d801b2a6989a0d74c141480
font_01_sfnt_off00011e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E39 10696 bytes
SHA-256: 90b6a1e4fe49dd13f228b1e24dfa3e12e5e7a548b67f1b62d0508a898f37c9b9

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